Charjabug

Charjabug is a /-type pokémon. It evolves from Grubbin starting at level 20 and evolves into Vikavolt when exposed to a Thunder Stone.

Pokédex Entries
It may appear like an easy snack for birds due to its plumpness and low mobility, but its thick carapace gives a nasty shock to would-be predators. They convert plant matter into electrical energy. This conversion is so efficient that laws have been passed to prevent this Charjabug from being exploited as a power source.