You cannot, just through trade, poketransfer or dream world (no longer accessible)
nope
In the dream yard
I'm sorry, but you can't catch Pichu in Pokémon Black / White. To get Pichu on Pokémon Black / White, you need to use Poké Transfer.
probably in the dream world
Pichu does not appear in pokemon red. However, Pikachu can be caught in red, blue and is given as a starter pokemon in pokemon yellow.
Pikachu can only be obtain by: Transfering it from the other Pokemon DS series. Trading for one. Get a Pichu and evolve it by high happiness.
You can't find a wild Pikachu, Pichu or Raichu in pokémon Black and White. You have to transfer it from an other game.
you find it at viridian forest
In Pokemon Platinum, Pichu can be found in the garden behind the Pokemon Mansion. The Pokemon Mansion is located on Route 212, south of Hearthome City.
you must go to the map and then click on the electricity map and thats it.but you will not find pichu instead of that you will find pichu notched
The 'Pikachu Coloured Pichu' (actually a shiny Pichu) can be found as part of a Nintendo Event.
You'll have to transfer one from a 4th gen game. There are NO Pikachu, Raichu, or Pichu in Black or White. It sucks...