I'm guessing you mean't "When does Pikachu Evolve?" Well there is no level for it. You have to use a Thunderstone for it to evolve into Raichu. ;)
Sorry I don't understand your question what do you mean levl 21bin weeivls?
level 40
Level 30.
72
he is very strong levl 48
Levl 17
Level 20
trade a graveler
it evolves at level 27
at levl 30
Pikachu's name is Pikachu.
A Pikachu evolves from a Pichu.