Abomasnow - Permanent Hail, Mixed attacker, slow. Frail.
Aerodactyl - Tailwind / Taunt, fast. Frail.
Alakazam - Special Attacker, fast
Amoonguss - spore,  Rage Powder, slow, special attacker Great Bulk,
Breloom - Faster Spore, physical attacker, good attack and slow, decent bulk
Blaziken - Speed Boost, physical attacker, fast, decent bulk
Bronzong - Trick Room setter, slow good bulk,
Crobat - Acrobatics, Tailwind / Taunt, fast. Frail.
Crawdaunt - Good attack, slow, frail
Chandelure - great special attack, Trick Room setter, medium speed, frail
Conkeldurr - great attack, guts,  , physical attacker, slow, priority good bulk
Cofagrigus - Trick Room Setter, special attacker, slow Good bulk
Cresselia - Trick Room setter, special attacker, slow great bulk,
Darmanitan - great attack, medium speed, physical attacker, kind of frail.
Dragonite - Physical / Special Attacker, medium - fast speed, good bulk
Dusclops - Eviolite, Trick Room setter great bulk,
Dusknoir - Trick Room setter, physical attacker, slow Good bulk,
Eelektross - good attack and special attack, acrobatics, physical / special attacker,  slow, good bulk
Ferrothorn - physical attacker, slow Great bulk,
Excadrill - Sand Force / Sand Rush. Great attack, fast, frail
Garchomp - good attack , physical attacker, fast, decent bulk
Gastrodon - Storm Drain, Special Attacker, Slow, decent bulk
Gengar - Special Attacker, high SpA. Frail.
Glaceon - special attacker, high special attack, slow - medium speed, frail
Gigalith - Physical attacker, great attack, explosion, slow, decent bulk
Gliscor - Acrobatics, good attack, medium speed good defense,
Golduck - Stops weather, Special Attacker, medium speed, decent bulk
Gyarados - Physical Attacker, good support moves, medium speed, decent bulk
Gallade - Trick Room setter, good attack. Medium speed, decent bulk
Hariyama - Fake Out, Guts, Physical Attacker, Slow and Strong, good bulk
Haxorus - monster attack, physical attacker, medium speed, decent bulk
Hippowdon - Permanent sand, slow good physical bulk
Hitmontop - Good attack, decent bulk, Physical attacker, slow - medium speed.
Hydreigon - good special attack, special attacker, medium speed, decent bulk
Infernape - Good attack and special attack, Fake Out, Mixed attacker, fast. Frail.
Jellicent - good bulk, special attacker, Trick Room setter, medium speed, good bulk
Krookodile - Good attack, Intimidate / Moxie, physical attacker, medium speed, kind of frail.
Landorus - good attack and special attack, physical / special attacker, fast, decent bulk
Latias - good special attack, special attacker, medium speed good bulk,
Latios -  great special attacker, tailwind, special attacker, medium speed, good bulk
Ludicolo - Swift Swim / Rain Dish, Special attacker, fast, good bulk
Lickilicky - Cloud Nine, medium speed, good bulk
Magnezone - Special attacker, good special attacker, medium speed, good bulk
Mamoswine - good attack, physical attacker, slow, priority, good bulk
Metagross - Good attack, slow, physical attacker, medium speed, good bulk
Murkrow - Prankster, Support, doesn’t need speed, good bulk
Nidoking - Special Attacker, Awesome type coverage, medium speed, decent bulk
Ninetales - Permanent Sun, Special Attacker, medium speed, decent bulk
Ninjask - Speed Boost, Taunt, Physical Attacker, fast and strong, frail
Politoed - Permanent Rain, Special Attacker, medium speed, decent bulk
Porygon2 - Eviolite tank, Trick Room setter, good support, special attacker, slow, great bulk
Porygon-Z - monster special attacker, fast, frail
Raikou - Special Attacker, good special attack, fast, decent bulk
Reuniclus - Trick Room setter, great special attack, special attacker, slow good bulk,
Rotom Forms - good special attack, special attacker, medium speed decent bulk,
Sableye - Prankster, Good support, doesn’t need speed, good bulk
Salamence - Tailwind, Physical attacker, medium speed, decent bulk
Scizor - Acrobatics, Physical Attacker, awesome attack, slow, priority, decent bulk
Shedinja - Wonder Guard, Rain Counter, slow, OHKO’d by every Super Effective hit
Shrifty - Chlorophyll, Explosion, physical attacker, fast.
Smeargle - Learns everything, great support, medium speed frail,
Starmie - Special Attacker, fast, frail
Snorlax- Selfdestruct, physical attacker, slow good  special defense,
Stoutland - Sand Rush, good attack, physical attacker, fast, pretty frail.
Suicune - special attacker, medium speed Good bulk
Swampert - Muddy Water, Special attacker, slow, good bulk
Terrakion - great attack, physical attacker, fast, medium bulk
Thundurus - good special attack, special attacker, fast, frail
Togekiss - Serene Grace, rely on luck, special attacker, medium speed, good bulk
Tornadus - good attack and special attack, physical / special attacker, tailwind, fast, frail
Toxicroak - Dry Skin, Fake Out, Sucker Punch, Good attack and decent speed, good bulk
Typholsion - Eruption, Special Attacker, medium speed, decent bulk
Tyranitar - Permanent sand, physical attacker, good attack, slow, decent bulk
Volcarona - great special attack, special attacker, Rage Powder, medium speed, decent bulk
Whimsicott - Prankster, good support moves, fast, frail.
Venusaur - Chlorophyll, Special Attacker, Sleep Powder, fast, decent bulk
Weavile - Fake Out, Physical attacker, good attack, fast, Frail.

Pokemon who receive a boost from:

Rain:
Amoonguss
Breloom
Crawdaunt
Ferrothorn
Gastrodon
Jellicent
Ludicolo
Scizor
Starmie
Suicune
Swampert
Toxicroak
+Thunder users, Water-types, and Fire weak pokemon

Sun:
Blaziken
Chandelure
Darmanitan
Infernape
Ninetales
Shriftry
Venusaur
+Fire-types, and Fire move users

Sand:
Excadrill
Garchomp
Hippowdon
Landorus
Stoutland
Tyranitar
+Rock, Steel, and Ground-type Pokemon

Hail:
Amomasnow
Glaceon
+Ice-types, and Blizzard users

Pokemon who BEAT:

Rain:
Amoonguss
Breloom
Ferrothorn
Golduck
Shedinja
Thundurus
Zapdos
+Electric and Grass-types

Sun:
Aerodactyl
Golduck
Gyarados
Jellicent
Politoed
Starmie
Suicune
+Ice, +Flying, +Water-types

Sand:
Amoonguss
Breloom
Golduck
Hitmontop (kind of)
Politoed
Suicune
Swampert
Weavile
+Ice, Fighting, +Water-types

Hail:
Aerodactyl (Only if faster)
Chandelure
Conkeldurr
Darmanitan
Hitmontop
Infernape
Metagross
Volcarona
+Fire +Fighting-types


Medium speed can function decently in Trick Room and is ideal for Tailwind.