You don't need to give it to pikachu, you select "use" and it should show pikachu's hp bar. select pikachu and it will evolve into raichu! hope this helps.
Pikachu and Eevee both need a Thunder Stone to evolve.
Pikachu into raichu
a thunder stone can evolve a pikachu. pikachu won't evolve on it's own.
eevee and pikachu. eevee and pikachu.
You can't, it needs a Thunder Stone.
You can evolve pikachu into a raichu:)
eevee and pikachu.
thunder stone
Give it a thunder stone.
evolves pikachu into raichu
it evolves with THUNDER stone
Pikachu Can't Evolve Without The Thunder Stone.