Can anyone give me a working code for the ???plate for arceus?

Question

needs to be for action reply for pokemon diamond

Answer 1

I'm in a team that has searched through the game's coding, and we haven't found the ???plate. it might be under a different name, but if it is isn't grouped with the rest of them.  you could try downloading the game yourself and modifying one of the plates with a hex editor, although that might not give you the desired effect.