*Note: To challenge the Master Trainer, you must put the correct Pokemon in the top left position (first) in the party.
- Abra Master (Viridian City)
- Aerodactyl Master (Pewter Museum of Science – Must pay to get in)
- Alakazam Master (Route 10 near Lavender Town)
- Arbok Master (Celadon City Game Rocket Corner – B1 (after puzzle on B2, head up the stairs))
- Arcanine Master (Celadon City – Inside house in bottom left of the city)
- Articuno Master (Seafoam Islands – B4)
- Beedrill Master (Route 8)
- Bellsprout Master (Viridian City – Inside Trainers’ School)
- Blastoise Master (Route 20 east of Seafoam Islands)
- Bulbasaur Master (Route 4)
- Butterfree Master (Guard Station between Pewter City and Viridian Forest)
- Caterpie Master (Route 18)
- Chansey Master (Fuchsia City – Inside Pokemon Center)
- Charmander Master (Celadon City Condominium – Access building from behind, head up to the roof and go through the roof door to the classroom)
- Charmeleon Master (Route 10 near Lavender Town)
- Clefable Master (Mt. Moon – B1)
- Clefairy Master (Saffron City)
- Cloyster Master (Route 20 east of Seafoam Islands)
- Cubone Master (Guard Station between Saffron City and Route 8)
- Dewgong Master (Seafoam Islands – B1)
- Diglett Master (Diglett’s Cave)
- Ditto Master (Cinnabar Island Pokemon Mansion – 3F)
- Dodrio Master (Route 15)
- Doduo Master (Cerulean City Bike Maniac)
- Dragonair Master (Seafoam Islands – B3)
- Dragonite Master (Cerulean City – Inside house northwest of the city)
- Dratini Master (Route 23 – Before Victory Road)
- Drowzee Master (Viridian City – Inside Pokemon Center)
- Dugtrio Master (Diglett’s Cave)
- Eevee Master (Route 17)
- Ekans Master (Route 4)
- Electabuzz Master (Route 10 near Power Plant)
- Electrode Master (Route 17)
- Exeggcute Master (Route 24)
- Exeggutor Master (Cinnabar Island)
- Farfetch’d Master (Vermilion City)
- Fearow Master (Route 18)
- Flareon Master (Celadon City Department Store – 4F)
- Gengar Master (Lavender Town)
- Geodude Master (Rock Tunnel – 1F)
- Ghastly Master (Lavender Town)
- Gloom Master (Pewter City)
- Golbat Master (Victory Road – 3F)
- Goldeen Master (Route 12)
- Golduck Master (Route 4 using Sea Skim)
- Golem Master (Pewter Museum of Science – Must pay to get in)
- Graveler Master (Victory Road – 1F)
- Grimer Master (Celadon City)
- Growlithe Master (Route 7)
- Gyarados Master (Celadon City – House in bottom left corner of the city)
- Haunter Master (Lavender Town)
- Hitmonchan Master (Saffron City Fighting Dojo)
- Hitmonlee Master (Saffron City Fighting Dojo)
- Horsea Master (Route 19)
- Hypno Master (Lavender Town Pokemon Tower – 5F)
- Ivysaur Master (Route 14)
- Jigglypuff Master (Pewter City – Inside Pokemon Center)
- Jolteon Master (Celadon City Department Store – 3F)
- Jynx Master (Cerulean City using Sea Skim)
- Kabuto Master (Mt. Moon – B2)
- Kabutops Master (Pewter City – Inside house in northeast corner of the city)
- Kadabra Master (Saffron City – House in bottom left corner of the city)
- Kakuna Master (Route 13)
- Kangaskhan Master (Fuchsia City – Safari Zone)
- Kingler Master (Saffron City Silph Co – 1F)
- Koffing Master (Route 17)
- Krabby Master (Vermilion City Pokemon Fan Club)
- Lapras Master (Lavender Town Pokemon Center – 4F)
- Lickitung Master (Route 16 – Inside Guard Station)
- Machamp Master (Vermilion City)
- Machoke Master (Fuchsia City – Inside house on bottom right of the city)
- Machop Master (Saffron City Silph Co – 4F)
- Magikarp Master (Route 4 in Pokemon Center)
- Magmar Master (Cinnabar Island Pokemon Mansion – 1F)
- Magnemite Master (Underground Path between Cerulean City and Vermilion City)
- Magneton Master (Underground Path between Cerulean City and Vermilion City)
- Mankey Master (Route 5)
- Marowak Master (Lavender Town Pokemon House)
- Melmetal Master (Cinnabar Island Pokemon Mansion – B1)
- Meltan Master (Cinnabar Island Pokemon Mansion – B1)
- Meowth Master (Viridian City – Inside Poke Mart)
- Metapod Master (Route 11)
- Mew Master (Cinnabar Island Pokemon Mansion – B1)
- Mewtwo Master (Cinnabar Island Pokemon Mansion – B1)
- Moltres Master (Victory Road – 2F)
- Mr. Mime Master (Celadon City Condominiums – 2F)
- Muk Master (Cinnabar Island Pokemon Mansion – 2F)
- Nidoran (female) Master (Route 3)
- Nidoran (male) Master (Route 4)
- Nidorina Master (Underground Path between Celadon City and Lavender Town)
- Nidorino Master (Underground Path between Celadon City and Lavender Town)
- Nidoking Master (Route 23 – Before Victory Road)
- Nidoqueen Master (Route 23 – Before Victory Road)
- Ninetales Master (Route 9)
- Oddish Master (Viridian City)
- Omanyte Master (Mt. Moon – B2)
- Omastar Master (Cinnabar Island – Inside Cinnabar Lab)
- Onix Master (Underground Path between Celadon City and Lavender Town)
- Paras Master (Mt. Moon – 1F)
- Parasect Master (Route 2)
- Persian Master (Celadon City Rocket Game Corner – B4)
- Pidgey Master (Route 2)
- Pidgeotto Master (Route 16)
- Pikachu Master (Viridian Forest)
- Pinsir Master (Guard Station on Route 18 near Fuchsia City)
- Poliwag Master (Route 12)
- Poliwhirl Master (Cerulean City – Inside house left of Pokemon Center)
- Poliwrath Master (Cerulean City – Go through house in north left of the city to the backyard next to the water)
- Ponyta Master (Saffron City)
- Porygon Master (Celadon City Rocket Game Corner – 1F)
- Primeape Master (Guard Station between Route 11 and 12)
- Psyduck Master (Route 21)
- Raichu Master (Lavender Town Pokemon Tower – 6F)
- Rapidash Master (Saffron City)
- Raticate Master (Cerulean City – Inside house that was ransacked)
- Rattata Master (Route 10 north of Rock Tunnel)
- Rhydon Master (Celadon City Rocket Game Corner – B2)
- Rhyhorn Master (Route 17)
- Sandshrew Master (Route 11)
- Sandslash Master (Guard Station between Route 7 and Saffron City)
- Scyther (Guard Station between Route 15 and Fuchsia City)
- Seaking Master (Route 13)
- Seel Master (Seafoam Islands – 1F)
- Shellder Master (Route 19)
- Slowbro Master (Route 21)
- Slowpoke Master (Route 21)
- Snorlax Master (Route 16)
- Spearow Master (Pewter City)
- Starmie Master (Route 25)
- Staryu Master (Route 19)
- Tangela Master (Route 15)
- Tauros Master (Fuchsia City – Safari Zone)
- Tentacool Master (Route 20 east of Seafoam Islands)
- Tentacruel Master (Route 20 west of Seafoam Islands)
- Vaporeon Master (Celadon City Department Store – 2F)
- Venomoth Master (Route 15)
- Venonat Master (Route 24)
- Venusaur Master (Route 23 – After Victory Road)
- Victreebel Master (Celadon City – bottom of the city near gym)
- Vileplume Master (Route 14)
- Voltorb Master (Power Plant)
- Vulpix Master (Route 6)
- Wartortle Master (Route 20 west of Seafoam Islands)
- Weedle Master (Viridian Forest)
- Weepinbell Master (Lavender Town Pokemon Tower – 7F)
- Weezing Master (Celadon City Rocket Game Corner – B3)
- Wigglytuff Master (Saffron City Silph Co – 11F (take portal on 3F in left office then head on the second portal to get to 11F))
- Zapdos Master (Power Plant)
- Zubat Master (Rock Tunnel – B1)