Welcome to Pokebeach. I noticed you mentioned having a shiny Arceus. Unless there's some hacked Rom or pokemon website called Diamond Beheeyems, that Arceus isn't a legitimate shiny. All Arceus giveaways (both via wonder cards and the one obtainable through entralink for BW1) have coding that prevents them from being shiny. The only "possible" way to get a shiny Arceus without directly hacking the pokemon is to hack a Azure Flute into Platinum version and either getting lucky or abusing the Random Number Generator to encounter one as a shiny. This means that Shiny Arceus can only be obtained through hacked in one way or another and can never be legitimate. It shouldn't mess up your save or anything, but I just thought you should know in case you traded something good for it, in which case you were kind of ripped off.