This moveset is outclassed by Chinchou in almost every way. Chinchou has more resistances and a better ability, and its moves can threaten grounds that try to take advantage of volt switch or brew coffee :P. Please use Chinchou instead of this moveset unless you hate Chinchou for some weird reason.
Yamper @ berry juice
EVs: 204 HP / 236 Atk / 36 Def
Adamant nature
- volt switch
- wild charge
- crunch
- fire fang
Use volt switch when you expect a switch and use whichever attack is the strongest when you don't expect a switch. EVs maximize HP and physical attack. Give it rattled when rattled Yamper becomes obtainable.