Legendary Encounters
Zapdos - New Mauville
https://imgur.com/DwVnnBj
Moltres - Fiery Path
https://imgur.com/zSEjeqx
Articuno - Shoal Cave
https://imgur.com/T71xS15
Jirachi - Meteor Falls
https://imgur.com/a/xoNQr
Deoxys - Get Aurora Ticket from Jirachi
Mewtwo - Abandoned Ship
https://imgur.com/bgznAUL is the object in the middle
Mew - Walk into wrap location in mewtwos room to get to its island
To get to mew go here in ship
https://imgur.com/bgznAUL
To get back to ship go here
https://imgur.com/zQOPN9W
Celebi - Altering Cave
https://imgur.com/FFkUKof
Entei - Victroy Road
https://imgur.com/i9w7V8I
Raikou - Victory Road
https://imgur.com/ocpR3cb
Suicune - Victory Road
https://imgur.com/CLZgl9G
Lugia - Get Mystic Tiket from Entei
Ho Oh - Get Mystic Ticket from

Normal Encounters

Route 101 - Wurmple, Poochynea, Weedle, Sandshrew, Caterpie, Spinarak, Rattata, Sentret, Zigzagoon, Mudkip

Route 102 - Poochyena, Vulpix, Wurmple, Apiom, Lotad, Nidoran F, Zizgagoon, Spearow, Ralts, Snubbul, Seedot
Using a Rod - Squirtle, Tototdile(old rod) Corphish, Tentacool, Magikarp, Mudkip, Chinchou, Crawdaunt, Dewgong

Route 103 - Zubat, Poochyena, Ledyba, Nidoran M, Wingull, Zigzagoon, Ekans, Pidgey, Pikachu, Chikorita

Peatlburge Woods - Venonat, Kakuna, Shroomish, Metapod, Heracross, Cascoon, Paras, Pineco, Slakoth, Taillow, Bulbasaur, Treecko

Route 104, Ratttata, Hoothoot, Poochyena, Sunkern, Marill, Odish, TAillow, Spearow, Charmander, Cyndaquil, Pidgey, Meditite

Route 116 - Zangoose, Whismur, Phanpy, Nincada, Sandschrew, Taillow, Teddiursa, Gligar, Skitty

Rusturf Tunnel - Geodude. Onix, Magby, Elekid, Diglet, Swinub, Lileep, Anorith, Whismur

Granite Cave Entrance - Zubat, Makuhita, Lunatone, Abra, Aron, Magnemite, Geodude, Voltorb.

Granite Cave Room 2 - Diglet, Aron, Grimer, Rhyhorn, Abra, Houndour, Makuhita, Sableye, Poliwag, Larvitar

Granite Cave room 3 - Slowpoke, Aron, Gastly, Machop, Misdreavus, Abra, Clefariy, Tyrogue, Natu, Sableye

Granite Cave room 4 - Zubat, Clefairy, Makuhita, Nidoran M, Shuckle, Nidroran F, Aron, Beldum

Route 109 - Surfing - Seel, Wingull. Wailmer, Dewgong, Pelipper.
Rod - Seel, Luvdisc, Magikarp, Tentacool, Gyrados, Wailord, Kingler.

route 110 - Nidoran F, Electrike, Gulpin, Minum, Oddish, Pichu, Wobbuffet, Pulse
Old rod - Omanyte, Krabby
Good rod - Barboach, Magikarp, Wailmer
Super Rod, VAporeon, Lapras, Tentacruel

Route 117 - Poochyena, Roselia, Butterfree, Gloom, Marill, Meowth, Illumise, Sunflora, Volbeat

Route 111
Desert - Sandslash, Trapinch, Sandshrew, Shuckle, Baltoy, Dugtrio, Sudowoodo
Fising - Old rod - Poliwag, Psyduck. Good rod - Quagsire, Goldeen, Spheal. Super Rog - Gyrados, Poliwhirl, Barboach

Route 112 - Growlithe, Numel, Vulpix. Houndour, Marill, Grimer

Fiery Path - Charmander, Koffing, Bagon, Machop, Torkoal, Koffing, Slugma, Cyndaquil, Torchic

Route 113 - Spinda, Bellsprout, Ponyta, Nosepass, Magmar, Solrock, Slugma, Skamory

Route 114 - Swablu, Bellsprout, Tauros, Lombre, Arbok, Seviper, Nuzleaf, Scyther.
Old Rod - Staryu, Goldeen
Good rod - Magikarp, Staryu, Barboach
Super Rod = lapras, Azumarill

Meteor Falls room 2 - Golbat, Golduck, Solrock, Aerodactyl, Gengar, Golbat, Crobat, Umbreon, Persian

Metor Fallls room 3 - Quagsire, Pupitar, Golbat, Solrock, Muk, Donphan, Loudred, Golbat, Poliwrath, Slowbro, Golbat

Meteor Falls final room(bagon room) - Kabutops, Omastar, Bagon, Armaldo, Cradlily, Solrock, Aerodactyl, Shelgon, golbat, Crobat

Route 115 - Swablue, Tailow, Pidgeotto, Swellow, Jigglypuff, Wigglytuff, Pelipper, Fearow, Wingull

Route 118 - Surf - Tentacruel, Starmie, Surskit, Pelipper
Grass - Raticate, Electrike, Furret, Linoone, Manectric, Pelipper, Gloom, Parasect, Wingull, Kecleon

Route 119 - Grass- Exeggcute, Linoone, Skiploom, Raticate, Wileplume, Weepinbell, Venomoth, Tropius, Kecleon
Super rod - Sharpedo, Carvanha

Route 120 - Eevee, Mightyena, Gloom, Azumarill, Parasect, Meowth, Marill, Absol, Kecleon.

Route 121 - Grass - Mightyena, Shuppet, Farfetch'd, Ledian, Gloom, Skitty, Smoochum, Noctowl, Kecleon
Surfing - Vaporeon, Seadra, Slowking, Kingdra

Route 124, Quilfish, Horsea, Seaking, Lanturn, Lapras

Route 125, Wailmer, Masquerain, Seel, Dewgong, Lapras

Route 126 - Cloyster, Sealeo, Feebad, Lanturn Vaporeon

Route 127 - sharpedo, Whiscash, Wailord, Wingull, Tentacool

Route 128 - Wartortle, Marhstomp, Croconaw, gyrados, Magikarp

Rpute 129 = Tentacruel, Wingull, Crawdaunt, Politoed, Wailord

Route 130 Tentacool, Wingull, Walrein, Milotic

Route 132 - Chinchou, Staryu, Barboach, Blastoise, Vaporeon

Underwater, Clamperl, huntail, Relicanth, Shellder, Chinchou,Gorebyss,

Jagged Pass - Charmeleon, COmbusken, Machop, Quilava, Spoink, Magby, Miltank

Mt Pyre room 1-2, Shuppet, Gastly, Misdreavus, Haunter Duskull

Mt Pyre room 3 - the same as room 1-2 but adds dusclops

Room 4(outside) Shuppet, Ninetales, Vulpix, Baltoy, Pidgeotto, Nosepass, Noctowl

Seafloor Cavern - Zubat, Golbat, Crobat, Graveler, Onix, Steelix, Golem

Cavern room 2 - Geodude, Nosepass, Aron, Lairon, Graveler, Aggron, Golbat, Golem

Cavern 3 - Zubat, Golbat

Cavern 4 - Paras, Venonat, Delibird, diglet, Dugtrio, Sneasel, Mankey Primeape

Cave of origins - Golbat, Crobat, Zubat, Weezing
room 2- Golbat, Haunter, Sableye, Zubat, Gengar
Room 3 - Omanyte, Lileep, Anorith, Kabuto, Kabutops, Omastar, Cradily, Armaldo, Golbat

room 4-5, when you think encounters are going to get better they dont.
Zubat and golbat all year round.

Victory Road 1 - Crobat, Ahriyama, Aggron, Exploud, Exeggutor, Cacturne, Hariyama, Hitmonlee, Hitmonchan, Machamp
Room 2 - Nidoking, Hariyama, Steelix, Scizor, Alakazam, Hariyama, Rhydon, Espeon, Metagross, Mawile, Ampharos, Kangaskhan
Room 3 - Nidoqueen, Raichu, Charizard, Typhlosion, Blaziken, Machamp, Rapidash, Tyranitar, Pilowsine, Hitmontop, Shiftry, Magneton

Magma Hideout - Graveler, Torkoal, Geodude, Nosepass, Onix.
Room 2 -  Graveler, Torkoal, Onix, Grimer, Magmar.
Room 3 - Graveler, Torkoal, Geodude, Rhyhorn, Magby, Magmar
Room 4 - Ekans, Torkoal, Geodude,  Muk, Graveler, Golem, Arbok
Room 5 - Quilava, Charmeleon,  Numel, torkoal Yanma, Graveler

Desert Underpass - Ditto, Exploud, Rhydon