I heard it was a rumor for the gameboy advance, but then I looked into some forums and they said they couldn't get past some parts in it etc. Also I saw this pic on Ebay:
Now either ppl r selling things on Ebay that don't exist(which is illegal)or this is one fricken awsome game, look at this vid of Chaos:
I mean those r some pretty cool pokemon there, and look at the one on the front cover of the box.
Plz tell me wut u guys know about this mystery...