Brock has returned to Pewter City so he can study to become a Pokémon Doctor. However, a Nurse Joy that is a Pokémon Inspection Officer declares that the Gym Leader change was not certified. Hearing this, Forrest challenges Nurse Joy to a battle to prove his worth as the new Pewter City Gym Leader. Will Forrest defeat Nurse Joy and succeed Brock as the new Gym Leader of Pewter City?