At the Pokethlon Dome or at the Bug Catching Contest
Chat with our AI personalities
You get it from Billy's Grandfather on route 25 after showing him some pokemon.
Pikachu into Raichu, and Eevee into Jolteon. I don't recommend evolving Eevee into Jolteon. Espeon is way better.
VulpixGrowlitheEevee
After you battle and beat the gym
You have to have the Engnima stone.