>>22304495Well, Chesnaught works in a weird way, but I'll give you basic mixed set.
Chesnaught @ Leftovers
Ability: Bulletproof
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Seed Bomb/Super Fang/Spikes
- Leech Seed
- Spiky Shield
- Drain Punch
This is mostly a defensive set, but the latter three are it's most essential in play. You can alternate with what you want for the other. Seed Bomb is good if you also want to go offensive+grass STAB. Super Fang is good for stalling, and Spikes is good for setups.
Depending on whatever you want, yii can also play around with his moveset and find out which ones you like.