To keep your Pichu from evolving, give it an Everstone. It will not evolve until you take the Everstone off of it.
Give them a everstone or press b when they are evolving ;)
Put 2 pikachu in the day care
#155 in Hoenn is Pichu.
You can't, you have to breed Pikachu.
By evolving Grimer
you have to breed pikachu or raichu
It evolves by happiness
You need to transfer a pichu to xd from firered or leafgreen or ruby, sapphire or emerald to have one.
its for evolving pokemon.. eg. gloom --> bellosum
Breed (a) Pikachu or Raichu in the Daycare Center to the west of Mauville City.
You can either keep on hitting the B button when it's starting to evolve or you can let it hold an Ever Stone which prevents it from evolving.
No, only in Pokemon Diamond/Pearl and Emerald/Ruby/Sapphire.