Well yes pichu can and other type of Pokemon
You evolve it up with high friendship
with high friendship
with high friendship
You can evolve happiny with an oval stone after its friendship is high
when it has high friendship
give it the oval stone when it has high friendship
You have to level it up with high friendship.
Level it up with high friendship
pichu does not evolve at a level,it evolves with a high friendship.Pichu can evolve at any level if it has enough friendship.
You gotta have high friendship at day time ;)
from Riley he gives you a Riolu egg and you can evolve it at high friendship
You can only level it up by, high friendship