You have to be more specific. Pikachu has been in just about every Pokemon game there is and what moves it learns has been updated several times. So just ask "What moves does Pikachu learn in E.G. Pokemon FireRed version?"
Yes.
mocchi
pichu
mocchi
You can't.
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
Pikachu means "electric mouse".