Editing Spear Pillar's Pokemon?

[TokoyamiTheDark]

Hi! I have a BBRES of a certain Pokemon from PokePark Wii that I wish to port over Dialga, Palkia and Cresselia, but when I directly replace the BRRES of the PAC file of the stage containing either one of the three Pokemon, the Wii crashes... After replacing the Pokemon by the BRRES containing the new Pokemon, what should I do to make them work? Can anyone help, please?