So I was thinking. Why not a powerful Muk team? Strategy would be to pull off force switching in, trap them with Team Aqua Hideout. Or go the other way and use the more potent Virbank City Gym to get crazy poison damage. Would not have to rely on stadium cards to maintain poison and disrespect with Seviper on bench.
Balloon berry, hyper potion, and heavy boots are to help keep the big Muk healthy and also everyone else to a lesser extent.