I was traded a Thundurus through Wonder Trade with the ability Prankster. But here's the thing, the Thundurus was inside a Dream Ball. Correct me if I'm wrong but don't all Pokémon in the Dream World have their HA's when caught in a Dream Ball? Would this Thundurus I was traded be considered not legit, because if so that would really suck.
Hi! Looks like you got the answer you needed so I'll lock this thread. For future reference, you'd probably be best posting this in the Official Hack Checking Thread over at the Trade Corner.