With their adventures in the Orange Islands behind them, Ash, Misty and Tracey arrive at Pallet Town and when they get to Ash`s house there is an unexpected surprise waiting for them. Ladies and gentlemen, Brock is back! When asked what happened between him and Professor Ivy Brock just went into fetal position and said "Don't mention that name." Just then Delia comes in and explains that after Professor Ivy dumped him and Brock had been her houseguest. She also claimed that he and Mimey fight over the chores. A short while later they go see Professor Oak and Tracey is estatic to meet him. Sometime after Team Rocket tries to capture all the Pokémon at the lab only to be stopped by Gary and his Nidoqueen. Ash then challenges Gary to a Pokémon battle and Gary accepts. Who will win this battle?
Brock was dumped by Professor Ivy prior to this episode.
The "Who's that Pokémon?" in this episode is Omastar.