Things You'll Need
Instructions
Start your "Pokemon: Yellow" game and place the Pokemon you want to alter in the first slot of your Pokemon roster. Make sure to note which of the four slots the HM move is set.
Save your game and turn the system off. Restart your Game Boy with the GameShark plugged in.
Refer to your note saying which move slot the HM is set. If it's the first slot, enter the code 01#HD1. If it's the second slot, enter the code 01#ID1. If it's the third slot, enter the code 01#JD1. If it's the fourth slot, enter the code 01#KD1. Refer to the Resource section for the two-digit move codes to replace the ## in each code.