Pokemon: Minimum Badge Requirement, Before/After PokeFlute; Location (considering minimum badge requirement)

Bulbasaur: Before Misty; Oak's Lab
Charmander: Before Misty; Oak's Lab
Squirtle: Before Misty; Oak's Lab
Caterpie: Before Misty; Route 2(Blue only), 24(Blue only), 25, Viridian Forest
Metapod: Before Misty; Route 24(Blue only), 25, Viridian Forest
Weedle: Before Misty; Route 2(Red only), 24(Red only), 25, Viridian Forest
Kakuna: Before Misty; Route 24(Red only), 25, Viridian Forest
Pidgey: Before Misty; Route 1, 2, 3, 5, 6, 24, 25
Rattata: Before Misty; Route 1, 2, 4, 22
Spearow: Before Misty; Route 3, 4, 22
Ekans (Red only): Before Misty; Route 4
Pikachu: Before Misty; Viridian Forest
Sandshrew (Blue only): Before Misty; Route 4
Nidoran♀: Before Misty; Route 5, 22, Underground Path 5-6
Clefairy: Before Misty; Mt. Moon
Vulpix (Blue only): 2 Badges; Before PokeFlute; Route 7, 8 
Jigglypuff: Before Misty; Route 3
Zubat: Before Misty; Mt. Moon
Oddish (Red only): Before Misty; Route 5, 6, 24, 25
Paras: Before Misty; Mt. Moon
Venonat: 2 Badges, After PokeFlute; Route 12, 13, 14, 15, Safari Zone
Diglett: Before Misty; Diglett's Cave
Dugtrio: Before Misty; Diglett's Cave
Meowth (Blue only): Before Misty; Route 5, 6
Psyduck: 2 Badges, After PokeFlute; Safari Zone, Super Rod (Route 24, 25)
Mankey (Red only): Before Misty; Route 5, 6
Growlithe (Red only): 2 Badges; Before PokeFlute; Route 7, 8
Poliwag: 2 Badges, Before PokeFlute; Good Rod(Route 6, 10, 11, 12, 22, 24, 25, Celadon City, Fuchsia City, Pallet Town, Vermilion City, Viridian City)
Poliwhirl: 2 Badges, After PokeFlute; Super Rod(Route 10, Celadon City)
Abra: Before Misty; Route 24, 25
Machop: 2 Badges, Before PokeFlute; Rock Tunnel
Bellsprout (Blue only): Before Misty; Route 5, 6, 24, 25
Tentacool: 2 Badges, After PokeFlute; Super Rod(Route 12, 13, 17, 18, 19, Pallet Town, Viridian City)
Tentacruel: 2 Badges), After PokeFlute; Super Rod(Route 12, 13, 17, 18, 19, Pallet Town, Viridian City)
Geodude: Before Misty; Mt. Moon
Ponyta: 3 Badges; Pokémon Mansion
Slowpoke: 2 Badges, After PokeFlute; Route 10, Celadon City, Safari Zone
Magnemite: 3 Badges; Power Plant
Magneton: 3 Badges Power Plant
Farfetch'd: Before Misty; Vermilion City (Trade for Spearow)
Doduo: 2 Badges), Before PokeFlute; Route 16
Seel: 3 Badges; Cinnabar Island (Trade for Ponyta), Seafoam Islands
Dewgong: 3 Badges; Seafoam Islands
Grimer: 3 Badges; Pokémon Mansion
Muk: 3 Badges; Pokémon Mansion
Shellder: 2 Badges, After PokeFlute; Super Rod (Route 6, 11, 19, Vermilion City)
Gastly: 2 Badges, Before PokeFlute; Pokémon Tower
Haunter: 2 Badges, Before PokeFlute; Pokémon Tower
Onix: 2 Badges, Before PokeFlute; Rock Tunnel
Drowzee: Before Misty; Route 11
Krabby: 2 Badges, After PokeFlute; Super Rod(Route 6, 11, 12, 13, 17, 18, 24, 25, Fuchsia City, Vermilion City, Safari Zone)
Voltorb: 2 Badges, Before PokeFlute; Route 10
Exeggcute: 2 Badges, After PokeFlute; Safari Zone
Cubone: 2 Badges, Before PokeFlute; Pokémon Tower
Hitmonlee: 2 Badges, Before PokeFlute; Saffron City
Hitmonchan: 2 Badges, Before PokeFlute; Saffron City
Lickitung: 2 Badges, After PokeFlute; Route 18 (Trade for Slowbro)
Koffing: 3 Badges; Pokémon Mansion
Weezing: 3 Badges; Pokémon Mansion
Rhyhorn: 2 Badges, After PokeFlute; Safari Zone
Chansey: 2 Badges, After PokeFlute; Safari Zone
Tangela: 2 Badges, After PokeFlute; Route 21
Kangaskhan: 2 Badges, After PokeFlute; Safari Zone
Horsea: 2 Badges, After PokeFlute; Super Rod(Route 19)
Goldeen: 2 Badge, Before PokeFlute; (Route 6, 10, 11, 12, 22, 24, 25, Celadon City, Fuchsia City, Pallet Town, Vermilion City, Viridian City)
Staryu: 2 Badges, After PokeFlute; Super Rod(Route 19)
Mr. Mime: Before Misty; Route 2 (Trade for Abra)
Scyther (Red only): 2 Badges, Before PokeFlute(Game Corner)/After PokeFlute(Safari Zone)
Jynx: 2 Badges; Cerulean City (Trade for Polywhirl)
Electabuzz (Red only): 3 Badges; Power Plant
Magmar (Blue only): 3 Badges; Pokémon Mansion
Pinsir (Blue only): 2 Badges, Before PokeFlute(Game Corner)/After PokeFlute(Safari Zone)
Tauros: 2 Badges, After PokeFlute; Safari Zone
Magikarp: Before Misty: Route 4 (Buy for 500$)
Lapras: 2 Badges, After PokeFlute; Silph Co.
Ditto: 2 Badges, After PokeFlute; Route 13, 14, 15
Eevee: 2 Badges, Before PokeFlute; Celadon City
Porygon: 2 Badges, Before PokeFlute; Game Corner
Omanyte: 3 Badges; Cinnabar Island
Kabuto: 3 Badges; Cinnabar Island
Aerodactyl: 3 Badges; Cinnabar Island
Snorlax: 2 Badges, After PokeFlute; Route 12, 16
Articuno: 4 Badges; Seafoam Islands
Zapdos: 3 Badges; Power Plant
Moltres: 8 Badges; Victory Road
Dratini: 2 Badges, Before PokeFlute(Game Corner)/After PokeFlute(Safari Zone)
Mewtwo: 8 Badges+E4; Cerulean Cave

Fewest Glitch%
Mewtwo: 1 Badge, 2x BTW or
		0 Badges, 1x BTW & 1x Safari WTW or
		1 Badges, 1x TrainerFly & good luck finding a 131 special pokemon

Mew: 1 Badge, 1x FlyTrainer