Muk from platinum. It is not the best pokemon in the world, but when poisoned, it can be quite tough. Its pokebody removes 2 damage when under special con., it can deal 70 damage when poisoned and confuses the enemy. It has 100 HP, but also 3 retreat cost. It is a good partner for mightyena. Sure it deals -20 damage for dialga, but with skunktank g, it poisons and confuses it. If the opponent sprays the Skuntank g, Muk can poison itself or the opponent with its first attack. And with Nidoqueen, it heals itself for 20 when poisoned. I don't know how will it do vs. a Luxchomp, but it is a good idea, none the less.