Mate you go to New Mauville. Where you shut down that generator for that electric gym leader Watson. Its next to the generator unless you have in already. Good luck bro
There is no way for the Pikachu that was automatically given to you as your Starter to accept the Thunderstone.
pikachu
You need a thunder stone. He doesn't evolve by level. :)
you can evolve pikachu into Raichu and Eevee into Jolteon
a thunder stone can evolve a pikachu. pikachu won't evolve on it's own.
Pikachu can evolve into a Raichu.
PIKACHU
eevee and pikachu.
thunder stone
Pikachu and Eevee both need a Thunder Stone to evolve.
Use a thunder stone
Pikachu evolves by using a thunderstone, so technically he can evolve at any level.
You can't, it needs a Thunder Stone.