just a question (since i can't find answers easily)
if i was to use pokemon from the bonus discs for the mt. battle challenge (jirachi, celebi and pikachu) would they still be able to be used for the Ho-Oh and the ribbon, or does it have to exclusively be pokemon you caught and purified in-game?
I've heard both as answers but nothing definitive, and for my big challenge i'd like to know that for sure.