Muk @ Life Orb
Ability: Sticky Hold
EVs: 104 HP / 96 Atk / 240 SpA / 68 Spe or 160 HP / 96 Atk / 252 SpA
Quiet Nature
- Gunk Shot
- Focus Blast
- Fire Blast
- Giga Drain / Thunderbolt / Dark Pulse
Life Orb mixed attacking Muk is pretty fun. Being able to beat things like Probopass and Pawniard without having to lock yourself into Focus Punch is cool while still having Gunk Shot's high power, with it actually being stronger than 252+ AV Muk's Gunk Shot. Fire Blast lets you beat defensive Mawile without having to take any hits, and 2HKO Klang and Metang. Focus Blast is more the previously mentioned Probo and Pawn, while also just being a high powered move, having a good chance to OHKO Stoutland and Ursaring after rocks. Last moveslot is up to you, Giga Drain is an accurate way of hitting Golem and Relicanth, T-Bolt hits Vullaby, Pelipper, and Drifblim, while Dark Pulse lets you beat up on Misdreavus, Dusknoir, and the previously mentioned Drifblim.
EVs are weird, but 84 attack ensures you 2HKO Audino with Gunk without rocks, 240 SpA for power, 68 speed is to outspeed uninvested base 50s, and the rest is dumped into HP. While speed investment with a speed lowering nature may seem bad(which it probably is), any other nature would either dampen Muk's great uninvested bulk or attacking power, though if you don't mind getting outran by uninvested 50s, you can invest the EVs into bulk.