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That's my setup currently. I bred in stockpile because it's so perfect for him. Much better than Haze imo. He can tank two physical attackers with ease on his own and most special attacks that would normally kill him. Scald is nice for burns to wait out anybody who can't be poisoned...
I kind of like baneful bunker in doubles.
I would use it and then fire off Earthquake with my partner. Toxapex is safe vs Earthquake it's really effective against him, then you can fire off toxic on what's left from earthquake dmg and mop up.