Pokémon Red and Blue Game Genie codes
This article lists Game Genie codes for the main handheld Pokémon games. Game Genie codes differ from Pokémon GameShark codes (first two generations) in that they work by making temporary ROM patches to the game.
Feel free to add your own.
'Instant win' every battle
C91-1EB-5D4
Notes: Similar to Pokémon Gold, Silver and Crystal behavior for having no available Pokémon on the field.
Access Trainer classes:
XXF-549-C49 and 3EF-539-B31
(XX should be replaced with the desired Trainer class (actual index number or Trainer escape glitch value -200). Artificial Trainer classes are supported)
Ghosts don't have ghost sprite and can attack you. Can't attack them:
C98-3AA-081
Battle corruption, if wild battle "invisible battle" mode:
C90-4CB-D5D
Trainers have Charizard 'M with excessive HP:
C9C-53A-081
Break Pokémon and some Trainer sprites:
C94-FDD-F77
Predef commands are broken.
C9E-6DC-4C1
Notes: The title screen intro is skipped, some sprites never load and you start in a Glitch City with no money. You're trapped as well with these orange lines in front of you that makes it look like Red is trapped behind bars. Can't load save data, but doesn't destroy it after you turn off the power and play without this code
Breaks beginning of bank switch function
Notes: Also breaks many sprites and game functions. Text at the beginning of title screen intro is missing as well
C95-D6C-2A9
Instead of Trainer approach music, the previous music continues to play:
C93-E8C-081
Base stats modifications
Magikarp
XX must be replaced with the desired base stat in hexadecimal.
XX1-DFA-B3A: HP
XX1-E0A-C42: Attack
XX1-E1A-3B6: Defense
XX1-E2A-A2B: Speed
XX1-E3A-B3A: Special