OK /vp/, I've just got my hands on ORAS so I can battle my little brother over wifi. He's 10, but plays a lot and loves the game. He wants to battle me, and I want to put together a team which will be fun and challenging but not too OP. I don't want to use legendaries, not really fussed about megas. Emphasis on fun here, really I want to build a team to surprise him.

Suggestions?