it depends on whitch code. Dont save if you are in mystery zone by using the walk through walls code.
Action replay
Action replay is not an Pokémon item that can be obtained in Diamond.
Go to neoseekers.com
No
no you have to get is from an action replay or go to a Pokemon event
GO TO ACTIONREPLAY.COM YOU SHOULD GET SOMETHING.
An Action Replay DSi should already have the complete Pokédex code for diamond and pearl already built in.
Find an action replay code and program it, that's how you get many masterballs on Pokemon diamond action REPLAY. ;)
action replay
action replay
action replay
action replay