Pikachu is an Electric Type mouse Pokemon given to Satoshi (Ash in the English version) as a last choice since he was late getting to Professor Oak's lab the day he was to be given his first Pokemon. At first Pikachu avoided Satoshi, shocking him every time he had a chance. He soon warms up to Satoshi after he saves him from wild Spearows. These two soon grow a bond stronger than any others. Pikachu does not like to be kept inside his Pokeball, and is usually seen riding on Satoshi/Ash's shoulder as they travel together.