Pikachu is Ash's Pokemon, and the first. Pikachu is the mascot of the Pokemon franchise. When Ash was late to get a starter Pokemon, he ended up having to get a Pikachu. Pikachu has won many battles, Pikachu has been used in a lot of Ash's major battles and has traveled with Ash to every region. Pikachu was shown to have a love of ketchup as shown in Showdown in Dark City. Pikachu has met it's Mewtwo-produced clone and didn't want to fight. Pikachu has had its memory transformed to help create the mirage Pokemon, Mewtwo. In Unova, Zekrom electrified Pikachu, making it temporarily unable to use electric attacks. Pikachu doesn't like fighting with other Pokemon, and is usually one of the ones trying to break the fight up.
Pokemon Yellow is a Generation 1 game that followed the Pokemon Anime. Pikachu is your starter Pokemon and Charmander, Bulbasaur, and Squirtle are aviliable in-game. Jessie, James, and Meowth are also seen in this game. Pikachu is also considered the strongest Pikachu.
Related ThreadsWhy does ashes pikachu lose over half it's battles in the show? - last post by @ Apr 25, 2014
Ash' Pikachu - last post by @ Aug 20, 2009
what would you do if you were fighting a 97 foot ash pikachu - last post by @ Apr 24, 2002
Ash, Cilan and Iris Anime Team - last post by @ Sep 12, 2011
Ash and misty the fight - last post @ Nov 8, 2014