No thunder stone could make him evolve into something this cool. Meet Pikachu in the style of a Japanese Mecha!
While some people have been calling this Pikachu Warrior, it sort of reminds us of the complex designs of the Aeons in the Final Fantasy series. Imagine a Pikachu-Bahamut crossover, now that would be something. This pic was taken by Rin at Anime North 2012.