I believe Joltiks store electricity they get from other sources, because they aren't able to generate electricity themselves. [ With a smile, she nuzzles Wattson against her cheek before reaching up so the Joltik can sit on her head. ] They usually absorb static from larger Pokemon, or humans sometimes, but they have ways of drawing electricity from other places too.

But it's so sweet that he wanted to be part of your team too.