Boltt

Boltt is an Electric Type Specialist, and the gym leader of Ecitrea. When you defeat him you receive the Storm Badge. You also get the ability to use Charge outside of battle, as well as Electric Terrain and Thunder Bolt.

Team
Volt/Revolt OR Devolt

Pichu/Pikachu/Raichu

Jolteon

Plusle OR Minun

Shinx/Luxio/Luxray

Magnemite/Magneton/Magnezone

Gym
The gym is a maze of doors and levels, and you have to find the right buttons to open them.