Turn nurse joys, gym leaders and other people to pikachus:
01021EC2
Enter the above code as a GameShark code in your emulator's cheat menu.
Save your game before you activate the cheat in case anything goes wrong.
If you are playing on a GameBoy with the original Pokemon Yellow Special Pikachu Edition cartridge, then you will need an actual GameShark device to enter this or any GameShark code into the game.
If you need more help, we've got more Pokemon Yellow: Special Pikachu Edition cheats and also check out all of the answers for this game
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