Chesnaught actually has a really nice movepool. It gets access to all sorts of moves like Swords Dance, Bulk Up, Pain Split, Curse, and Gyro Ball, in addition to the great ones it commonly uses. We all know, though, what the manliest move is:
Chad Smith (Chesnaught) @ Salac Berry
Ability: Bulletproof
EVs: 28 HP / 252 Atk / 4 Def / 224 Spe
Jolly Nature
- Belly Drum
- Rock Slide
- Seed Bomb
- Brick Break
The best scenario for this is to come in on Mienshao for free after their scarfer or anything faster than base 115s is removed. Then, Mienshao will U-Turn, not daring to go for HJK when Chesnaught probably has Spiky Shield, and not doing much with any other moves. U-Turn will do just over 25%, and combined with the Belly Drum, will get you into Salac range. This also works with any other attack that does between 25-50%, but that's just one specific, commonish example. It is pretty gimmicky, but it makes up for it with manliness and a few unique traits. Because of its Grass-type STAB, it doesn't have to worry about any bulky waters that physical sweepers normally need to, and drumming as they switch to their normal Chesnaught switch-in, like Shaymin or Victini can really surprise them, and it's great hilarious fun to sweep with a Chesnaught. You just need to get a little bit of chip damage on it before you go for the set up, which can be annoying, but it's a fun set. It's a small list of Pokemon that can survive a hit at +6, and those ones aren't hard to weaken a bit. If you remove priority, scarfers, and Noivern/Crobat/Jolteon/Aerodactyl/Manectric, it can definitely win the game.
Calcs are pretty pointless to include, obviously it's going to do a lot of damage at +6 and obviously defensive calcs aren't that important beyond seeing what it can take for between 25-50%.
By the way,
Klefki Uxie is an awesome partner. Screens/Memento really help to get attacks into the Salac range for you after Belly Drum.