I'm taking back my vote on Mega Medicham. After thinking about it for a bit I don't know if I would consider it a metagame titan because of the brief time it was allowed in Monotype, much like quickbanned Pokemon, and failed to leave a big footprint on the metagame because of that. I'll give my vote to Victini.
Voting for #8 has been going on for quite a while so I'll end it here with Victini as the winner. Voting for #9 is now up! I'm indifferent, so I'll abstain on this one.