Oh, there's a serious problem with the team validator then. The easiest thing to do would just be to remove the "required" Abilities from Gen 3 "events", but that would allow things with one Ability that can't or haven't evolved to use their slot 2 Ability in Gen 4+, which is no good.I'm trying to use it in gen 3. The problem is when you do it it flags you as saying you can only use Run Away as an ability (obviously illegal on Mightyena)
[fwiw the other 3 moves are all gen 3 tm moves, shadow ball, roar, taunt]
I'll have to think about how to fix that properly (and confirm that Pokemon from XD can actually have their single Ability in slot 2). Thanks for bringing this up, looks like it's been an issue since before XY came out.