#013 Weedle
bugpoison
gameshark0170D7CF
Found at Viridian Forest and Routes 24 & 25 in Red.
Yellow Edition gaps
The Ones You Can't Catch
A note before you cheat To use these GameShark codes in Pokémon Yellow, enter the code into your device or emulator and turn it on. Walk into tall grass or a cave, and the next wild Pokémon you encounter will be the specified Pokémon. Turn the code off after catching it to resume normal gameplay.
Version exclusives
The Red/Blue side of the cartridge. None of these spawn in Yellow without trading or cheating.
#014 Kakuna
bugpoison
gameshark0171D7CF
Found at Viridian Forest and Routes 24 & 25 in Red.
#015 Beedrill
bugpoison
gameshark0172D7CF
Found at Routes 24 & 25 (rare) in Red.
#023 Ekans
poison
gameshark016CD7CF
Found at Routes 4, 9, 22 and 23 in Red.
#024 Arbok
poison
gameshark012DD7CF
Found at Route 23 in Red.
#052 Meowth
normal
gameshark014DD7CF
Found at Routes 5, 6, 7 and 8 in Blue.
#053 Persian
normal
gameshark0190D7CF
Found at Route 23 in Blue.
#109 Koffing
poison
gameshark0137D7CF
Found at Routes 16, 17, 18 and Pokémon Mansion in Red.
#110 Weezing
poison
gameshark018FD7CF
Found at Pokémon Mansion in Red.
#124 Jynx
icepsychic
gameshark0148D7CF
Found in Red and Blue: In-game trade in Cerulean City (give a Poliwhirl).
#125 Electabuzz
electric
gameshark0135D7CF
Found at Power Plant in Red.
#126 Magmar
fire
gameshark0133D7CF
Found at Pokémon Mansion in Blue.
Special conditions
#026 Raichu
electric
gameshark0155D7CF
Your starter Pikachu refuses Thunder Stones, and there are no wild Pikachu in Yellow. You must trade a normal Pikachu from Red/Blue into Yellow and evolve it, trade for a Raichu directly, or use this cheat code to force one to spawn.
#151 Mew
psychic
gameshark0115D7CF
Only legitimately obtainable via historical Nintendo events or the infamous in-game 'Mew Glitch'. Alternatively, you can use this GameShark code to encounter it in the wild.
Trade-locked evolutions
Four Gen 1 Pokémon evolve only by being traded to another game. Without a second cartridge (or a clever workaround), they will sit in your Pokédex as Kadabra, Machoke, Graveler, and Haunter forever.
#065 Alakazam
psychic
gameshark0195D7CF
From Kadabra. Trade your Kadabra to a partner. It evolves into Alakazam the moment it appears in the recipient's game. Trade it back if you want it on your file. · Catch a wild Kadabra on Route 8 (rare, Lv 20) or evolve Abra (Game Corner prize, or wild Routes 5 & 6, 7, 8, 24 & 25) at Lv 16.
#068 Machamp
fighting
gameshark017ED7CF
From Machoke. Trade your Machoke to a partner. It evolves into Machamp immediately on arrival in their game. · Catch a wild Machoke on Victory Road (Lv 38–40), or evolve Machop (Rock Tunnel, Victory Road) at Lv 28.
#076 Golem
rockground
gameshark0131D7CF
From Graveler. Trade your Graveler to a partner. It evolves into Golem immediately on arrival in their game. · Catch a wild Graveler on Victory Road (Lv 36–40), or evolve Geodude (Mt. Moon, Rock Tunnel, Victory Road, Cerulean Cave) at Lv 25.
#094 Gengar
ghostpoison
gameshark010ED7CF
From Haunter. Trade your Haunter to a partner. It evolves into Gengar immediately on arrival in their game. · Catch a wild Haunter in Pokémon Tower (Lv 20–25) or in Cerulean Cave, or evolve Gastly (Pokémon Tower) at Lv 25.
To achieve a perfect 151 Pokédex, you will also need to trade to get the Eeveelutions you didn't evolve your Eevee into, the Fossil you didn't pick, and the Fighting Dojo Pokémon you didn't pick.