| DEX↕️ | ✔️ | Name↕️ | Game↕️ | Location↕ |
|---|---|---|---|---|
| 1 | Bulbasaur | Blue | Starter | |
| 2 | Ivysaur | Blue | Evolve Bulbasaur (Lv. 16) | |
| 3 | Venusaur | Blue | Evolve Ivysaur (Lv. 32) | |
| 4 | Charmander | Blue | Starter | |
| 5 | Charmeleon | Blue | Evolve Charmander (Lv. 16) | |
| 6 | Charizard | Blue | Evolve Charmeleon (Lv. 36) | |
| 7 | Squirtle | Blue | Starter | |
| 8 | Wartortle | Blue | Evolve Squirtle (Lv. 16) | |
| 9 | Blastoise | Blue | Evolve Wartortle (Lv. 36) | |
| 10 | Caterpie | Blue | Routes 2, 24, 25, Viridian Forest | |
| 11 | Metapod | Blue | Routes 24, 25, Viridian Forest | |
| 12 | Butterfree | Blue | Evolve Metapod (Lv. 10) | |
| 13 | Weedle | Blue | Route 25, Viridian Forest | |
| 14 | Kakuna | Blue | Route 25, Viridian Forest | |
| 15 | Beedrill | Blue | Evolve Kakuna (Lv. 10) | |
| 16 | Pidgey | Blue | Routes 1, 2, 3, 5, 6, 7, 8, 12, 13, 14, 15, 21, 24, 25 | |
| 17 | Pidgeotto | Blue | Routes 14, 15, 21 | |
| 18 | Pidgeot | Blue | Evolve Pidgeotto (Lv. 36) | |
| 19 | Rattata | Blue | Routes 1, 2, 4, 9, 16, 21, 22 | |
| 20 | Raticate | Blue | Routes 16, 17, 18, 21 | |
| 21 | Spearow | Blue | Routes 3, 4, 9, 10, 11, 16, 17, 18, 22, 23 | |
| 22 | Fearow | Blue | Routes 17, 18, 23 | |
| 23 | Ekans | Blue | Trade | |
| 24 | Arbok | Blue | Trade | |
| 25 | Pikachu | Blue | Viridian Forest, Power Plant | |
| 26 | Raichu | Blue | Power Plant, Cerulean Cave | |
| 27 | Sandshrew | Blue | Routes 4, 8, 9, 10, 11, 23 | |
| 28 | Sandslash | Blue | Route 23, Cerulean Cave | |
| 29 | NidoranF | Blue | Route 22, Safari Zone | |
| 30 | Nidorina | Blue | Safari Zone
Trade Nidorino on Route 11 | |
| 31 | Nidoqueen | Blue | Evolve Nidorina (Moon Stone) | |
| 32 | NidoranM | Blue | Route 22, Safari Zone | |
| 33 | Nidorino | Blue | Safari Zone, Celadon Game Corner | |
| 34 | Nidoking | Blue | Evolve Nidorino (Moon Stone) | |
| 35 | Clefairy | Blue | Mt. Moon, Celadon City (Rocket Game Corner) | |
| 36 | Clefable | Blue | Evolve Clefairy (Moon Stone) | |
| 37 | Vulipx | Blue | Routes 7, 8, Pokemon Mansion | |
| 38 | Ninetales | Blue | Evolve Vulpix (Fire Stone) | |
| 39 | Jigglypuff | Blue | Route 3 | |
| 40 | Wigglytuff | Blue | Cerulean Cave | |
| 41 | Zubat | Blue | Mt. Moon, Rock Tunnel, Seafoam Islands, Victory Road | |
| 42 | Golbat | Blue | Seafoam Islands, Victory Road, Cerulean Cave | |
| 43 | Oddish | Blue | Trade | |
| 44 | Gloom | Blue | Trade | |
| 45 | Vileplume | Blue | Trade | |
| 46 | Paras | Blue | Mt. Moon, Safari Zone | |
| 47 | Parasect | Blue | Safari Zone, Cerulean Cave | |
| 48 | Venonat | Blue | Routes 12, 13, 14, 15, Safari Zone | |
| 49 | Venomoth | Blue | Safari Zone, Victory Road, Cerulean Cave | |
| 50 | Diglett | Blue | Diglett's Cave | |
| 51 | Dugtrio | Blue | Diglett's Cave | |
| 52 | Meowth | Blue | Routes 5, 6, 7, 8 | |
| 53 | Persian | Blue | Evolve Meowth (Lv. 28) | |
| 54 | Psyduck | Blue | Seafoam Islands
Routes 24, 25, Cerulean City, Cerulean Gym, Safari Zone (Super Rod) | |
| 55 | Golduck | Blue | Seafoam Islands | |
| 56 | Mankey | Blue | Trade | |
| 57 | Primeape | Blue | Trade | |
| 58 | Growlithe | Blue | Trade | |
| 59 | Arcanine | Blue | Trade | |
| 60 | Poliwag | Blue | Routes 6, 10, 11, 12, 13, 17, 18, 19, 20, 21, 22, 23, 24, 25, Pallet Town, Viridian City, Cerulean City, Cerulean Gym, Cerulean Cave, Vermilion City, Celadon City, Fuchsia City, Safari Zone, Seafoam Islands, Cinnabar Island, Indigo Plateau (Good Rod)
Pallet Town, Viridian City, Route 22 (Super Rod) | |
| 61 | Poliwhirl | Blue | Route 10, Celadon City (Super Rod) | |
| 62 | Poliwrath | Blue | Evolve Poliwhirl (Water Stone) | |
| 63 | Abra | Blue | Routes 24, 25, Celadon City (Rocket Game Corner) | |
| 64 | Kadabra | Blue | Cerulean Cave | |
| 65 | Alakazam | Blue | Evolve Kadabra (Trade) | |
| 66 | Machop | Blue | Rock Tunnel, Victory Road | |
| 67 | Machoke | Blue | Victory Road | |
| 68 | Machamp | Blue | Evolve Machoke (Trade) | |
| 69 | Bellsprout | Blue | Routes 5, 6, 7, 12, 13, 14, 15, 24, 25 | |
| 70 | Weepinbell | Blue | Routes 12, 13, 14, 15 | |
| 71 | Victreebel | Blue | Evolve Weepinbell (Leaf Stone) | |
| 72 | Tentacool | Blue | Routes 19, 20, 21 (Surfing)
Routes 12, 13, 17, 18, Pallet Town, Viridian City (Super Rod) | |
| 73 | Tentacruel | Blue | Evolve Tentacool (Lv. 30) | |
| 74 | Geodude | Blue | Mt. Moon, Rock Tunnel, Victory Road | |
| 75 | Graveler | Blue | Victory Road | |
| 76 | Golem | Blue | Evolve Graveler (Trade) | |
| 77 | Ponyta | Blue | Pokemon Mansion | |
| 78 | Rapidash | Blue | Evolve Ponyta (Lv. 40) | |
| 79 | Slowpoke | Blue | Seafoam Islands Route 10, Celadon City, Safari Zone (Super Rod) | |
| 80 | Slowbro | Blue | Route 23, Cerulean Cave (Super Rod) Seafoam Islands (Walking) | |
| 81 | Magnemite | Blue | Power Plant | |
| 82 | Magneton | Blue | Power Plant, Cerulean Cave | |
| 83 | Farfetch'd | Blue | Trade Spearow in Vermillion City | |
| 84 | Doduo | Blue | Routes 16, 17, 18, Safari Zone | |
| 85 | Dodrio | Blue | Cerulean Cave | |
| 86 | Seel | Blue | Seafoam Islands
Trade Ponyta at the Pokemon Lab | |
| 87 | Dewgong | Blue | Seafoam Islands | |
| 88 | Grimer | Blue | Pokemon Mansion | |
| 89 | Muk | Blue | Pokemon Mansion | |
| 90 | Shellder | Blue | Seafoam Islands
Routes 6, 11, 19, 20, 21, Vermilion City, Seafoam Islands, Cinnabar Island (Super Rod) | |
| 91 | Cloyster | Blue | Evolve Shellder (Water Stone) | |
| 92 | Gastly | Blue | Pokemon Tower | |
| 93 | Haunter | Blue | Pokemon Tower | |
| 94 | Gengar | Blue | Evolve Haunter (Trade) | |
| 95 | Onix | Blue | Rock Tunnel, Victory Road | |
| 96 | Drowzee | Blue | Route 11 | |
| 97 | Hypno | Blue | Cerulean Cave | |
| 98 | Krabby | Blue | Routes 6, 11, 12, 13, 17, 18, 24, 25, Cerulean City, Vermilion City, Fuchsia City, Safari Zone (Super Rod)
Seafoam Islands | |
| 99 | Kingler | Blue | Route 23, Cerulean Cave (Super Rod)
Seafoam Islands | |
| 100 | Voltorb | Blue | Route 10, Power Plant | |
| 101 | Electrode | Blue | Power Plant
Cerulean Cave Trade Raichu at the Pokemon Lab | |
| 102 | Exeggcute | Blue | Safari Zone | |
| 103 | Exeggutor | Blue | Evolve Exeggcute (Leaf Stone) | |
| 104 | Cubone | Blue | Pokemon Tower | |
| 105 | Marowak | Blue | Victory Road, Cerulean Cave | |
| 106 | Hitmonlee | Blue | Received from the master of the Fighting Dojo in Saffron City | |
| 107 | Hitmonchan | Blue | Received from the master of the Fighting Dojo in Saffron City | |
| 108 | Lickitung | Blue | Trade Slowbro on Route 18 | |
| 109 | Koffing | Blue | Pokemon Mansion | |
| 110 | Weezing | Blue | Pokemon Mansion | |
| 111 | Rhyhorn | Blue | Safari Zone | |
| 112 | Rhydon | Blue | Cerulean Cave | |
| 113 | Chansey | Blue | Safari Zone, Cerulean Cave | |
| 114 | Tangela | Blue | Route 21 | |
| 115 | Kangaskhan | Blue | Safari Zone | |
| 116 | Horsea | Blue | Routes 19, 20, 21, Seafoam Islands, Cinnabar Island (Super Rod) | |
| 117 | Seadra | Blue | Route 23, Cerulean Cave (Super Rod) | |
| 118 | Goldeen | Blue | Routes 6, 10, 11, 12, 13, 17, 18, 19, 20, 21, 22, 23, 24, 25, Pallet Town, Viridian City, Cerulean City, Vermilion City, Celadon City, Fuchsia City, Safari Zone, Seafoam Islands, Cinnabar Island, Indigo Plateau, Cerulean Cave (Good Rod)
Routes 6, 12, 13, 17, 18, 19, 20, 21, 22, 24, 25, Cerulean City, Fuchsia City, Seafoam Islands, Cinnabar Island (Super Rod) | |
| 119 | Seaking | Blue | Route 23, Fuchsia City, Cerulean Cave (Super Rod) | |
| 120 | Staryu | Blue | Seafoam Islands
Routes 19, 20, 21, Cinnabar Island, Seafoam Islands (Super Rod) | |
| 121 | Starmie | Blue | Evolve Staryu (Water Stone) | |
| 122 | Mr. Mime | Blue | Trade Abra on Route 2 | |
| 123 | Scyther | Blue | Trade | |
| 124 | Jynx | Blue | Trade Poliwhirl in Cerulean City | |
| 125 | Electabuzz | Blue | Trade | |
| 126 | Magmar | Blue | Pokemon Mansion | |
| 127 | Pinsir | Blue | Safari Zone, Celadon City (Rocket Game Corner) | |
| 128 | Tauros | Blue | Safari Zone | |
| 129 | Magikarp | Blue | Routes 6, 10, 11, 12, 13, 17, 18, 19, 20, 21, 22, 23, 24, 25, Pallet Town, Viridian City, Cerulean City, Vermilion City, Celadon City, Fuchsia City, Safari Zone, Seafoam Islands, Cinnabar Island, Indigo Plateau, Cerulean Cave (Old Rod)
Routes 12, 13, 17, 18, Fuchsia City (Super Rod) | |
| 130 | Gyarados | Blue | Evolve Magikarp (Lv. 20) | |
| 131 | Lapras | Blue | Received from a person in Silph Co. (Saffron City) | |
| 132 | Ditto | Blue | Routes 13, 14, 15, 23, Cerulean Cave | |
| 133 | Eevee | Blue | Received from a person in Celadon Mansion | |
| 134 | Vaporeon | Blue | Evolve Eevee (Water Stone) | |
| 135 | Jolteon | Blue | Evolve Eevee (Thunder Stone) | |
| 136 | Flareon | Blue | Evolve Eevee (Fire Stone) | |
| 137 | Porygon | Blue | Rocket Game Corner | |
| 138 | Omanyte | Blue | Helix Fossil | |
| 139 | Omastar | Blue | Evolve Omanyte (Lv. 40) | |
| 140 | Kabuto | Blue | Dome Fossil | |
| 141 | Kabutops | Blue | Evolve Kabuto (Lv. 40) | |
| 142 | Aerodactyl | Blue | Old Amber | |
| 143 | Snorlax | Blue | Routes 12, 16 (Only two) | |
| 144 | Articuno | Blue | Seafoam Islands (Only one) | |
| 145 | Zapdos | Blue | Power Plant (Only one) | |
| 146 | Moltres | Blue | Victory Road (Only one) | |
| 147 | Dratini | Blue | Safari Zone (Super Rod)
Rocket Game Corner | |
| 148 | Dragonair | Blue | Evolve Dratini (Lv. 30) | |
| 149 | Dragonite | Blue | Evolve Dragonair (Lv. 55) | |
| 150 | Mewtwo | Blue | Cerulean Cave (Only one) | |
| 151 | Mew | Blue | Event |