(1 of 5) 001 Bulbasaur - Route 4 (east): Halfway along the route.

Number	Trainer	Location
001	Bulbasaur	Route 4 (east): Halfway along the route.
002	Ivysaur	Route 14: South-east corner.
003	Venusaur	Route 23: Outside exit of Victory Road, on Indigo Plateau side.
004	Charmander	Celadon City: Penthouse atop Condominium (via back entrance).
005	Charmeleon	Route 10 (south): South-west corner.

(1 of 5) 006 Charizard - Route 23: South of Indigo Plateau, towards the left.

Number	Trainer	Location
006	Charizard	Route 23: South of Indigo Plateau, towards the left.
007	Squirtle	Route 12: Near Lavender Town entrance.
008	Wartortle	Route 20: In the water towards the north, west from Seafoam Islands.
009	Blastoise	Route 20: South-east of Seafoam Islands.
010	Caterpie	Route 18: Near Fuchsia City.

(1 of 5) 011 Metapod - Route 11: North-east corner.

Number	Trainer	Location
011	Metapod	Route 11: North-east corner.
012	Butterfree	Route 2: Gatehouse near Pewter City.
013	Weedle	Viridian Forest: To left of signpost opposite southern gatehouse.
014	Kakuna	Route 13: Tall grass towards east.
015	Beedrill	Route 8: Enclosed area halfway across.

(1 of 5) 016 Pidgey - Route 2: On the left, near Viridian City.

Number	Trainer	Location
016	Pidgey	Route 2: On the left, near Viridian City.
017	Pidgeotto	Route 16: Towards north.
018	Pidgeot	Route 12: Northern gatehouse (upstairs).
019	Rattata	Route 10: Above the Pokémon Center.
020	Raticate	Cerulean City: North-east house (one that was burgled).

(1 of 5) 021 Spearow - Pewter City: Right of entrance via Route 2.

Number	Trainer	Location
021	Spearow	Pewter City: Right of entrance via Route 2.
022	Fearow	Route 18: Below gatehouse near Fuchsia City.
023	Ekans	Route 4 (east): On ledge above the tall grass.
024	Arbok	Rocket Hideout: Floor B1, in south-west room.
025	Pikachu	Viridian Forest: To the right of northern gatehouse.