Either another Pikachu, a Raichu or a Pichu.
pichu
Battle
Trophy Garden. You can also get Pichu there.
Pikachu means "electric mouse".
wild pikachus might be holding it when you catch them
Yes.
mocchi
You can't.
pichu
mocchi
They are in veridian forest 2. Usually one random wave of pikachus go during that level.
First, you have to get a Yellow Orb from a scour Next, you have to hatch 6 pichus and evolve them all into pikachus Finally, you have to give each of the 6 pikachus (the ones that you hatched) the yellow orb. (you don't need 6 yellow orbs you just need to take it away from the pikachus) Hope this helped!
about 25
Viridian Forest
As many as you can get
Battle
Trophy Garden. You can also get Pichu there.