After a particularly nasty battle with a Spearow, the young Ash is distraught that he has hurt his new Pikachu Pokémon, but Misty tells him about a place called a Pokémon Center where Pokémon can be healed. Ash rushes off, Pikachu in his arms, and soon arrives in Viridian City. At the Pokémon Center, Nurse Joy takes over and gets Pikachu on the mend, but Team Rocket have seen the potential of the electric Pokémon, and are angered by the ‘Wanted’ posters all over Viridian City with their heads on them!
They attack the Center and Nurse Joy tries in vain to move all of the sick Pokémon to the nearby Pewter City Pokémon Center. It seems that Pikachu just can’t fend off Team Rocket, but somehow this amazing Pokémon pulls electricity from the Center’s back-up power generator and ThunderShocks Team Rocket to oblivion!