They make a seperate one for DSis than for DSes?
The only real things I've used an action replay for are my competitive team—999 rare candies for getting them to adequate levels, and 999 BP for buying items and vitamins. Oh, and a pokémodifier to get a Baltoy so that I didn't have to wait for a Swarm. But none of the pokémon (except debatably Claydol, which has legit moves and stats) are directly cheated on/hacked.
The only real things I've used an action replay for are my competitive team—999 rare candies for getting them to adequate levels, and 999 BP for buying items and vitamins. Oh, and a pokémodifier to get a Baltoy so that I didn't have to wait for a Swarm. But none of the pokémon (except debatably Claydol, which has legit moves and stats) are directly cheated on/hacked.