You find it at Route 2, which is north of Viridian City.
Pikachu is found in Route 2or you can buy one at the celadon game corner for 2,222 coins.
It can be found on Route 2, where Viridian Forest used to be, or coin purchase from Celadon Game Corner.
You can find Pikachu in the dreamworld, but not in the regular game.
You can find it in Pokemon Platinum, Pokemon Crystal, Pokemon HeartGold, and Pokemon SoulSilver.
You can't find a wild Pikachu, Pichu or Raichu in pokémon Black and White. You have to transfer it from an other game.
The only way to get Eon Mail in Pokemon G/S/C is if you have a Pokemon Pikachu (a special Tamogatchi-type pedometer), which you can then send 000 points to your game through Mystery Gift.
You cannot find pikachu in pokemon black.
Pokemon Liquid Crystal is not a game. However, in Pokemon Crystal, one can find a water stone on Route 25, along with most other evolutionary stones available within the game.
Unfortunately, you can't find a wild Pikachu in Pokemon Black. To get it, you need to use PokeTransfer to transfer it from another Pokemon Game, or to find it in the Dream World, and send it to your Entralink. Hope I helped :)
Find a Pikachu on red or blue, find the surfing hm, teach it surf, trade pikachu with another pokemon, and you have a surfing pikachu.
You'll have to transfer one from a 4th gen game. There are NO Pikachu, Raichu, or Pichu in Black or White. It sucks...
To find a Pikachu in Pokemon Diamond, go to the Pokemon Mansion. Go to the Trophy Garden. At random, a wild Pikachu will appear.