you can't. But maybe if you have an action replay, you might be able to find a code for a Pokemon level 255.
Chat with our AI personalities
Pokemon can't go to level 255, even with a code, because it's not in the game at all. If you've seen one, it's due to hacking, which is not what AR codes do.
You have to get it up to 255! happiness.
a easier way of leveling up is below! Pokemon level 1-30 find a level 50 Pokemon Pokemon level 31-100 find a level 100 Pokemon Pokemon level 101-200 fight a level 200 Pokemon Pokemon level 201-300 fight a level 300 Pokemon and so on... WARNING YOU MUST DO THIS ON VERY EASY!!
Train your pokemon.
Red's Pokemon levels are his level 88 Pikachu, and the rest of his Pokemon are at level 84.