Maybe your game is wrecked or you have an old Action Replay. I think that you need the 1.54 version.
you have to put the game id in it is this: ADAE-636791C0
Action replay
Action replay is not an Pokémon item that can be obtained in Diamond.
No
Go to neoseekers.com
no you have to get is from an action replay or go to a Pokemon event
action replay
action replay
action replay
action replay
its a cheat
Action replay.