Inheritance

    {
        name: "Inheritance",
        section: "Other Metagames",

        ruleset: ['Pokemon', 'Species Clause', 'OHKO Clause', 'Moody Clause', 'Evasion Moves Clause', 'Endless Battle Clause', 'HP Percentage Mod', 'Team Preview', 'Swagger Clause', 'Baton Pass Clause', 'Sleep Clause Mod', 'Cancel Mod'],
        banlist: ['Soul Dew', 'Gengarite', 'Kangaskhanite', 'Lucarionite', 'Mawilite', 'Salamencite',
            'Gengar-Mega', 'Kangaskhan-Mega', 'Mewtwo', 'Lugia', 'Ho-Oh', 'Blaziken', 'Mawile-Mega', 'Salamence-Mega',
            'Kyogre', 'Groudon', 'Rayquaza', 'Deoxys', 'Deoxys-Attack', 'Deoxys-Defense', 'Deoxys-Speed', 'Lucario-Mega',
            'Dialga', 'Palkia', 'Giratina', 'Giratina-Origin', 'Darkrai', 'Shaymin-Sky', 'Arceus', 'Reshiram', 'Zekrom',
            'Kyurem-White', 'Genesect', 'Greninja', 'Aegislash', 'Xerneas', 'Yveltal',
            'Slaking', 'Regigigas', 'Shedinja', 'Kyurem-Black'
        ],
        validateSet: (function () {
            var pokemonWithAbility;
            var createAbilityMap = function () {
                var abilityMap = Object.create(null);
                for (var speciesid in Tools.data.Pokedex) {
                    var pokemon = Tools.data.Pokedex[speciesid];
                    for (var key in pokemon.abilities) {
                        var abilityId = toId(pokemon.abilities[key]);
                        if (abilityMap[abilityId]) {
                            abilityMap[abilityId].push(speciesid);
                        } else {
                            abilityMap[abilityId] = [speciesid];
                        }
                    }
                }
                return abilityMap;
            };
            var getPokemonWithAbility = function (ability) {
                if (!pokemonWithAbility) pokemonWithAbility = createAbilityMap();
                return pokemonWithAbility[toId(ability)] || [];
            };
            var restrictedAbilities = {
                'Wonder Guard':1, 'Pure Power':1, 'Huge Power':1,
                'Shadow Tag':1, 'Imposter':1, 'Parental Bond':1
            };
            return function (set, teamHas) {
                var format = this.getFormat('inheritance');
                var problems = [];
                var inheritFailed = [];
                var isIncompatibility;
                var isHidden = false;
                var lsetData = {set:set, format:format};
                var name = set.name || set.species;

                var setHas = {};

                if (format.ruleset) {
                    for (var i = 0; i < format.ruleset.length; i++) {
                        var subformat = this.getFormat(format.ruleset[i]);
                        if (subformat.validateSet) {
                            problems = problems.concat(subformat.validateSet.call(this, set, format) || []);
                        }
                    }
                }
                var originalTemplate = this.getTemplate(set.species);
                var template = originalTemplate;

                item = this.getItem(set.item);
                ability = this.getAbility(set.ability);

                if (!ability.name) return [name + " needs to have an ability."];

                var banlistTable = this.getBanlistTable(format);

                var check = template.id;
                var clause = '';
                setHas[check] = true;
                if (banlistTable[check]) {
                    clause = typeof banlistTable[check] === 'string' ? " by " + banlistTable[check] : '';
                    problems.push(set.species + ' is banned' + clause + '.');
                } else if (!this.data.FormatsData[check] || !this.data.FormatsData[check].tier) {
                    check = toId(template.baseSpecies);
                    if (banlistTable[check]) {
                        clause = typeof banlistTable[check] === 'string' ? " by " + banlistTable[check] : '';
                        problems.push(template.baseSpecies + ' is banned' + clause + '.');
                    }
                }

                check = toId(set.ability);
                setHas[check] = true;
                if (banlistTable[check]) {
                    clause = typeof banlistTable[check] === 'string' ? " by " + banlistTable[check] : '';
                    problems.push(name + "'s ability " + set.ability + " is banned" + clause + ".");
                }
                check = toId(set.item);
                setHas[check] = true;
                if (banlistTable[check]) {
                    clause = typeof banlistTable[check] === 'string' ? " by " + banlistTable[check] : '';
                    problems.push(name + "'s item " + set.item + " is banned" + clause + ".");
                }
                if (banlistTable['Unreleased'] && item.isUnreleased) {
                    problems.push(name + "'s item " + set.item + " is unreleased.");
                }

                for (var i = 0; i < set.moves.length; i++) {
                    var move = this.getMove(string(set.moves[i]));
                    set.moves[i] = move.name;
                    check = move.id;
                    setHas[check] = true;
                    if (banlistTable[check]) {
                        clause = typeof banlistTable[check] === 'string' ? " by " + banlistTable[check] : '';
                        problems.push(name + "'s move " + set.moves[i] + " is banned" + clause + ".");
                    }

                    if (banlistTable['Unreleased']) {
                        if (move.isUnreleased) problems.push(name + "'s move " + set.moves[i] + " is unreleased.");
                    }
                }

                if (set.level < template.evoLevel) {
                    // FIXME: Event pokemon given at a level under what it normally can be attained at gives a false positive
                    problems.push(name + " must be at least level " + template.evoLevel + " to be evolved.");
                }

                if (problems.length) return problems;

                var pokemonPool = getPokemonWithAbility(ability);

                for (var it = 0; it < pokemonPool.length; it++) {
                    problems = [];
                    isIncompatibility = false;
                    template = this.getTemplate(pokemonPool[it]);
                    //if (template.species !== 'Banette-Mega') continue;
                    if (originalTemplate.species !== template.species) {
                        if (template.species === 'Smeargle') {
                            problems.push(name + " can't inherit from Smeargle.");
                        } else if (ability.name in restrictedAbilities &&
                            ability.name !== originalTemplate.abilities['0'] &&
                            ability.name !== originalTemplate.abilities['1'] &&
                            ability.name !== originalTemplate.abilities['H']) {
                            problems.push(name + " can't have " + set.ability + ".");
                        }
                    }
                    var check;
                    var clause = '';
                    if (banlistTable['Unreleased'] && template.isUnreleased) {
                        if (!format.requirePentagon || (template.eggGroups[0] === 'Undiscovered' && !template.evos)) {
                            problems.push(name + " (" + template.species + ") is unreleased.");
                        }
                    }

                    if (ability.name === template.abilities['H']) {
                        isHidden = true;

                        if (template.unreleasedHidden && banlistTable['illegal']) {
                            problems.push(name + "'s hidden ability is unreleased.");
                        } else if (this.gen === 5 && set.level < 10 && (template.maleOnlyHidden || template.gender === 'N')) {
                            problems.push(name + " must be at least level 10 with its hidden ability.");
                        }
                        if (template.maleOnlyHidden) {
                            set.gender = 'M';
                            lsetData.sources = ['5D'];
                        }
                    }

                    for (var i = 0; i < set.moves.length; i++) {
                        var move = this.getMove(set.moves[i]);

                        var problem = format.checkLearnset.call(this, move, template, lsetData);
                        if (problem) {
                            var problemString = name + " can't learn " + move.name;
                            if (problem.type === 'incompatible') {
                                if (isHidden) {
                                    problemString = problemString.concat(" because it's incompatible with its ability or another move.");
                                } else {
                                    problemString = problemString.concat(" because it's incompatible with another move.");
                                }
                                isIncompatibility = true;
                            } else if (problem.type === 'oversketched') {
                                problemString = problemString.concat(" because it can only sketch " + problem.maxSketches + " move" + (problem.maxSketches > 1 ? "s" : "") + ".");
                                isIncompatibility = true;
                            } else if (problem.type === 'pokebank') {
                                problemString = problemString.concat(" because it's only obtainable from a previous generation.");
                                isIncompatibility = true;
                            } else {
                                problemString = problemString.concat(".");
                            }
                            problems.push(problemString);
                        }
                    }

                    if (lsetData.sources && lsetData.sources.length === 1 && !lsetData.sourcesBefore) {
                        // we're restricted to a single source
                        var source = lsetData.sources[0];
                        if (source.substr(1, 1) === 'S') {
                            // it's an event
                            var eventData = null;
                            var splitSource = source.substr(2).split(' ');
                            var eventTemplate = this.getTemplate(splitSource[1]);
                            if (eventTemplate.eventPokemon) eventData = eventTemplate.eventPokemon[parseInt(splitSource[0], 10)];
                            if (eventData) {
                                if (eventData.nature && eventData.nature !== set.nature) {
                                    problems.push(name + " must have a " + eventData.nature + " nature because it has a move only available from a specific event.");
                                }
                                if (eventData.shiny) {
                                    set.shiny = true;
                                }
                                if (eventData.generation < 5) eventData.isHidden = false;
                                if (eventData.isHidden !== undefined && eventData.isHidden !== isHidden) {
                                    problems.push(name + (isHidden ? " can't have" : " must have") + " its hidden ability because it has a move only available from a specific event.");
                                }
                                if (this.gen <= 5 && eventData.abilities && eventData.abilities.indexOf(ability.id) < 0) {
                                    problems.push(name + " must have " + eventData.abilities.join(" or ") + " because it has a move only available from a specific event.");
                                }
                                if (eventData.gender) {
                                    set.gender = eventData.gender;
                                }
                                if (eventData.level && set.level < eventData.level) {
                                    problems.push(name + " must be at least level " + eventData.level + " because it has a move only available from a specific event.");
                                }
                            }
                            isHidden = false;
                        }
                    }
                    if (isHidden && lsetData.sourcesBefore) {
                        if (!lsetData.sources && lsetData.sourcesBefore < 5) {
                            problems.push(name + " has a hidden ability - it can't have moves only learned before gen 5.");
                        } else if (lsetData.sources && template.gender && template.gender !== 'F' && !{'Nidoran-M':1, 'Nidorino':1, 'Nidoking':1, 'Volbeat':1}[template.species]) {
                            var compatibleSource = false;
                            for (var i = 0, len = lsetData.sources.length; i < len; i++) {
                                if (lsetData.sources[i].charAt(1) === 'E' || (lsetData.sources[i].substr(0, 2) === '5D' && set.level >= 10)) {
                                    compatibleSource = true;
                                    break;
                                }
                            }
                            if (!compatibleSource) {
                                problems.push(name + " has moves incompatible with its hidden ability.");
                            }
                        }
                    }
                    if (!lsetData.sources && lsetData.sourcesBefore <= 3 && this.getAbility(set.ability).gen === 4 && !template.prevo && this.gen <= 5) {
                        problems.push(name + " has a gen 4 ability and isn't evolved - it can't use anything from gen 3.");
                    }
                    if (!lsetData.sources && lsetData.sourcesBefore >= 3 && (isHidden || this.gen <= 5) && template.gen <= lsetData.sourcesBefore) {
                        var oldAbilities = this.mod('gen' + lsetData.sourcesBefore).getTemplate(template.species).abilities;
                        if (ability.name !== oldAbilities['0'] && ability.name !== oldAbilities['1'] && !oldAbilities['H']) {
                            problems.push(name + " has moves incompatible with its ability.");
                        }
                    }

                    setHas[toId(template.tier)] = true;
                    if (banlistTable[template.tier]) {
                        problems.push(name + " is in " + template.tier + ", which is banned.");
                    }

                    if (teamHas) {
                        for (var i in setHas) {
                            teamHas[i] = true;
                        }
                    }
                    for (var i = 0; i < format.setBanTable.length; i++) {
                        var bannedCombo = true;
                        for (var j = 0; j < format.setBanTable[i].length; j++) {
                            if (!setHas[format.setBanTable[i][j]]) {
                                bannedCombo = false;
                                break;
                            }
                        }
                        if (bannedCombo) {
                            clause = format.name ? " by " + format.name : '';
                            problems.push(name + " has the combination of " + format.setBanTable[i].join(' + ') + ", which is banned" + clause + ".");
                        }
                    }

                    if (!problems.length) {
                        if (set.forcedLevel) set.level = set.forcedLevel;
                        return false;
                    }

                    if (isIncompatibility) {
                        inheritFailed.push({
                            species: template.species,
                            problems: problems
                        });
                    }
                }

                switch (inheritFailed.length) {
                case 0:
                    return [name + " has an illegal Inheritance set."];
                case 1:
                    return [name + " has an illegal set (incompatibility) inherited from " + inheritFailed[0].species].concat(inheritFailed[0].problems);
                case 2:
                    return [name + " has an illegal set (incompatibility) inherited either from " + inheritFailed[0].species + " or " + inheritFailed[1].species];
                default:
                    return [name + " has an illegal set (incompatibility) inherited from any among " + inheritFailed.map('species')];
                }
            };
        })(),
        checkLearnset: function (move, template, lsetData) {
            move = toId(move);
            template = this.getTemplate(template);

            lsetData = lsetData || {};
            var set = (lsetData.set || (lsetData.set = {}));
            var format = (lsetData.format || (lsetData.format = {}));
            var alreadyChecked = {};
            var level = set.level || 100;

            var isHidden = false;
            if (set.ability && this.getAbility(set.ability).name === template.abilities['H']) isHidden = true;
            var incompatibleHidden = false;

            var limit1 = true;
            var sketch = false;
            var blockedHM = false;

            var sometimesPossible = false; // is this move in the learnset at all?

            // This is a pretty complicated algorithm

            // Abstractly, what it does is construct the union of sets of all
            // possible ways this pokemon could be obtained, and then intersect
            // it with a the pokemon's existing set of all possible ways it could
            // be obtained. If this intersection is non-empty, the move is legal.

            // We apply several optimizations to this algorithm. The most
            // important is that with, for instance, a TM move, that Pokemon
            // could have been obtained from any gen at or before that TM's gen.
            // Instead of adding every possible source before or during that gen,
            // we keep track of a maximum gen variable, intended to mean "any
            // source at or before this gen is possible."

            // set of possible sources of a pokemon with this move, represented as an array
            var sources = [];
            // the equivalent of adding "every source at or before this gen" to sources
            var sourcesBefore = 0;
            var noPastGen = !!format.requirePentagon;
            // since Gen 3, Pokemon cannot be traded to past generations
            var noFutureGen = this.gen >= 3 ? true : !!(format.banlistTable && format.banlistTable['tradeback']);

            do {
                alreadyChecked[template.speciesid] = true;
                if (lsetData.ignoreMoveType && this.getMove(move).type === lsetData.ignoreMoveType) return false;
                if (template.learnset) {
                    if (template.learnset[move] || template.learnset['sketch']) {
                        sometimesPossible = true;
                        var lset = template.learnset[move];
                        if (!lset || template.speciesid === 'smeargle') {
                            lset = template.learnset['sketch'];
                            sketch = true;
                            // Chatter, Struggle and Magikarp's Revenge cannot be sketched
                            if (move in {'chatter':1, 'struggle':1, 'magikarpsrevenge':1}) return true;
                        }
                        if (typeof lset === 'string') lset = [lset];

                        for (var i = 0, len = lset.length; i < len; i++) {
                            var learned = lset[i];
                            if (noPastGen && learned.charAt(0) !== '6') continue;
                            if (noFutureGen && parseInt(learned.charAt(0), 10) > this.gen) continue;
                            if (learned.charAt(0) !== '6' && isHidden && !this.mod('gen' + learned.charAt(0)).getTemplate(template.species).abilities['H']) {
                                // check if the Pokemon's hidden ability was available
                                incompatibleHidden = true;
                                continue;
                            }
                            if (!template.isNonstandard) {
                                // HMs can't be transferred
                                if (this.gen >= 4 && learned.charAt(0) <= 3 && move in {'cut':1, 'fly':1, 'surf':1, 'strength':1, 'flash':1, 'rocksmash':1, 'waterfall':1, 'dive':1}) continue;
                                if (this.gen >= 5 && learned.charAt(0) <= 4 && move in {'cut':1, 'fly':1, 'surf':1, 'strength':1, 'rocksmash':1, 'waterfall':1, 'rockclimb':1}) continue;
                                // Defog and Whirlpool can't be transferred together
                                if (this.gen >= 5 && move in {'defog':1, 'whirlpool':1} && learned.charAt(0) <= 4) blockedHM = true;
                            }
                            if (learned.substr(0, 2) in {'4L':1, '5L':1, '6L':1}) {
                                // gen 4-6 level-up moves
                                if (level >= parseInt(learned.substr(2), 10)) {
                                    // we're past the required level to learn it
                                    return false;
                                }
                                if (!template.gender || template.gender === 'F') {
                                    // available as egg move
                                    learned = learned.charAt(0) + 'Eany';
                                } else {
                                    // this move is unavailable, skip it
                                    continue;
                                }
                            }
                            if (learned.charAt(1) in {L:1, M:1, T:1}) {
                                if (learned.charAt(0) === '6') {
                                    // current-gen TM or tutor moves:
                                    //   always available
                                    return false;
                                }
                                // past-gen level-up, TM, or tutor moves:
                                //   available as long as the source gen was or was before this gen
                                limit1 = false;
                                sourcesBefore = Math.max(sourcesBefore, parseInt(learned.charAt(0), 10));
                            } else if (learned.charAt(1) in {E:1, S:1, D:1}) {
                                // egg, event, or DW moves:
                                //   only if that was the source
                                if (learned.charAt(1) === 'E') {
                                    // it's an egg move, so we add each pokemon that can be bred with to its sources
                                    if (learned.charAt(0) === '6') {
                                        // gen 6 doesn't have egg move incompatibilities except for certain cases with baby Pokemon
                                        learned = '6E' + (template.prevo ? template.id : '');
                                        sources.push(learned);
                                        continue;
                                    }
                                    var eggGroups = template.eggGroups;
                                    if (!eggGroups) continue;
                                    if (eggGroups[0] === 'Undiscovered') eggGroups = this.getTemplate(template.evos[0]).eggGroups;
                                    var atLeastOne = false;
                                    var fromSelf = (learned.substr(1) === 'Eany');
                                    learned = learned.substr(0, 2);
                                    for (var templateid in this.data.Pokedex) {
                                        var dexEntry = this.getTemplate(templateid);
                                        if (
                                            // CAP pokemon can't breed
                                            !dexEntry.isNonstandard &&
                                            // can't breed mons from future gens
                                            dexEntry.gen <= parseInt(learned.charAt(0), 10) &&
                                            // genderless pokemon can't pass egg moves
                                            (dexEntry.gender !== 'N' || this.gen <= 1 && dexEntry.gen <= 1)) {
                                            if (
                                                // chainbreeding
                                                fromSelf ||
                                                // otherwise parent must be able to learn the move
                                                !alreadyChecked[dexEntry.speciesid] && dexEntry.learnset && (dexEntry.learnset[move] || dexEntry.learnset['sketch'])) {
                                                if (dexEntry.eggGroups.intersect(eggGroups).length) {
                                                    // we can breed with it
                                                    atLeastOne = true;
                                                    sources.push(learned + dexEntry.id);
                                                }
                                            }
                                        }
                                    }
                                    // chainbreeding with itself from earlier gen
                                    if (!atLeastOne) sources.push(learned + template.id);
                                    // Egg move tradeback for gens 1 and 2.
                                    if (!noFutureGen) sourcesBefore = Math.max(sourcesBefore, parseInt(learned.charAt(0), 10));
                                } else if (learned.charAt(1) === 'S') {
                                    // Event Pokémon:
                                    //  Available as long as the past gen can get the Pokémon and then trade it back.
                                    sources.push(learned + ' ' + template.id);
                                    if (!noFutureGen) sourcesBefore = Math.max(sourcesBefore, parseInt(learned.charAt(0), 10));
                                } else {
                                    // DW Pokemon are at level 10 or at the evolution level
                                    var minLevel = (template.evoLevel && template.evoLevel > 10) ? template.evoLevel : 10;
                                    if (set.level < minLevel) continue;
                                    sources.push(learned);
                                }
                            }
                        }
                    }
                    if (format.mimicGlitch && template.gen < 5) {
                        // include the Mimic Glitch when checking this mon's learnset
                        var glitchMoves = {metronome:1, copycat:1, transform:1, mimic:1, assist:1};
                        var getGlitch = false;
                        for (var i in glitchMoves) {
                            if (template.learnset[i]) {
                                if (!(i === 'mimic' && this.getAbility(set.ability).gen === 4 && !template.prevo)) {
                                    getGlitch = true;
                                    break;
                                }
                            }
                        }
                        if (getGlitch) {
                            sourcesBefore = Math.max(sourcesBefore, 4);
                            if (this.getMove(move).gen < 5) {
                                limit1 = false;
                            }
                        }
                    }
                }
                // also check to see if the mon's prevo or freely switchable formes can learn this move
                if (!template.learnset && template.baseSpecies !== template.species) {
                    // forme takes precedence over prevo only if forme has no learnset
                    template = this.getTemplate(template.baseSpecies);
                } else if (template.prevo) {
                    template = this.getTemplate(template.prevo);
                    if (template.gen > Math.max(2, this.gen)) template = null;
                } else if (template.baseSpecies !== template.species && template.baseSpecies !== 'Kyurem' && template.baseSpecies !== 'Pikachu') {
                    template = this.getTemplate(template.baseSpecies);
                } else {
                    template = null;
                }
            } while (template && template.species && !alreadyChecked[template.speciesid]);

            if (limit1 && sketch) {
                // limit 1 sketch move
                if (lsetData.sketchMove) {
                    return {type:'oversketched', maxSketches: 1};
                }
                lsetData.sketchMove = move;
            }

            // Now that we have our list of possible sources, intersect it with the current list
            if (!sourcesBefore && !sources.length) {
                if (noPastGen && sometimesPossible) return {type:'pokebank'};
                if (incompatibleHidden) return {type:'incompatible'};
                return true;
            }
            if (!sources.length) sources = null;
            if (sourcesBefore || lsetData.sourcesBefore) {
                // having sourcesBefore is the equivalent of having everything before that gen
                // in sources, so we fill the other array in preparation for intersection
                var learned;
                if (sourcesBefore && lsetData.sources) {
                    if (!sources) sources = [];
                    for (var i = 0, len = lsetData.sources.length; i < len; i++) {
                        learned = lsetData.sources[i];
                        if (parseInt(learned.substr(0, 1), 10) <= sourcesBefore) {
                            sources.push(learned);
                        }
                    }
                    if (!lsetData.sourcesBefore) sourcesBefore = 0;
                }
                if (lsetData.sourcesBefore && sources) {
                    if (!lsetData.sources) lsetData.sources = [];
                    for (var i = 0, len = sources.length; i < len; i++) {
                        learned = sources[i];
                        if (parseInt(learned.substr(0, 1), 10) <= lsetData.sourcesBefore) {
                            lsetData.sources.push(learned);
                        }
                    }
                    if (!sourcesBefore) delete lsetData.sourcesBefore;
                }
            }
            if (sources) {
                if (lsetData.sources) {
                    var intersectSources = lsetData.sources.intersect(sources);
                    if (!intersectSources.length && !(sourcesBefore && lsetData.sourcesBefore)) {
                        return {type:'incompatible'};
                    }
                    lsetData.sources = intersectSources;
                } else {
                    lsetData.sources = sources.unique();
                }
            }

            if (sourcesBefore) {
                lsetData.sourcesBefore = Math.min(sourcesBefore, lsetData.sourcesBefore || 6);
            }

            return false;
        }
    }