Now that the Hoenn League Tournament is over Ash says goodbye to his rivals Morrison and Tyson and leave Ever Grande City to head to Oldale Town to say their final good-byes before heading their separate ways. While preparing to eat lunch, May comments on how they are going to miss Brock's cooking when they go back home to Petalburg City and wish to bring some of Brock's recipes with them. Ash asks if they will remember to say hi for him to Norman and Max promises to do that and say to his dad that Ash should have won the league. Brock tells Ash that they should stop by to see Professor Birch in Littleroot Town. May and Max tell Ash that they will make sure to visit him in Pallet Town some time. Munchlax pops out of its Poké Ball and eats their lunch but Brock had extras just in case. Ash's group say their good-byes and tell each other to make sure to keep in touch.
Team Rocket returns to Team Rocket headquarters to speak to Giovanni about the excellent progress they made in the Hoenn Region. They are reluctant to face him and are worried that he will be very upset with him but go in anyway. Jessie and James say to Giovanni that they were the ones responsible for taking down Team Magma and Team Aqua forcing them to disband. Giovanni does not believe them, but gives them a new assignment and says that it is their reward for their hard work. As they are leaving, Team Rocket comments that being convincing does pay off and reward them. Giovanni gave them an assignment to go to Antarctica to get them out of the way. Butch and Cassidy run into Jessie and James with motor bikes and yell at them to move out of the way. Jessie tells them that they were given a top secret mission and tries to knock Cassidy over. Cassidy tells Jessie that Giovanni was just trying to get rid of them. They continue fighting over what Giovanni thinks of them until a Team Rocket Grunt runs to Cassidy and Butch with some urgent information. He tells them that Professor Namba has a very important assignment for them. Butch and Cassidy go to see him and return with jet packs to fly away to their next assignment. Team Rocket decides that to be able to keep up with Cassidy and Butch, they must come up with a new routine and motto. They grab a Team Rocket Grunt and demand for the equipment that Giovanni had assigned them. The equipment they were given were pogo sticks instead of scooters or jet packs. They head off towards their next mission.
May and Max arrive in their hometown of Petalburg City. Norman isn't home yet since he is out grocery shopping and would be back later, but Caroline is there to greet Max and May. They go to see the Pokémon in the greenhouse and May brings out all of her Pokémon to play. Bulbasaur smells some flowers, Skitty falls asleep in a tree, and the other Pokémon run around and play. Ash and Brock take a ferry back to Kanto and then split up from there to return to their respective hometowns of Pewter and Pallet Town. Ash spots a Poliwag in the lake and asks Max to come look at it but realizes that he is all by himself now. On his way through Viridian City Ash meets a mysterious man named Scott at the Viridian, who asks him if he is there to challenge the Gym Leader. Ash tells him that he has already won the Earth Badge from there. Scott says to Ash that he may be a good enough trainer to challenge the Battle Frontier. An older woman screams as she falls off of her bike and Ash and Scott go to check on her. The woman introduces herself to be Agatha and is going back inside the Gym. She explains to Ash that she has been at the Gym for six months as the new Gym Leader. Agatha asks Scott how his search for a strong trainer from the Seafoam Islands to challenge the Battle Frontier is going, and he says it hasn't been easy. Agatha asks Ash whether he is there to challenge the Gym and Ash explains that he has already won a badge from the Gym and had just placed eighth in the Hoenn League. Agatha and Scott are very impressed so Agatha asks Ash if he would like to have a Pokémon battle with her. Agatha says that she had faced two previous trainers but she defeated them easily so she was looking for a much bigger challenge. Ash says that he is unsure but Scott suggests that it would be a good idea.
Agatha brings out Gengar while Ash uses Pikachu in the battle. Agatha comments on how Pikachu is very strong. Ash scans Gengar with his Pokédex. Pikachu starts out with Quick Attack which completely misses Gengar since it is a Ghost-type Pokémon and Ash forgot. Agatha comments that Ash should not have forgotten that. Pikachu uses Thunderbolt as Gengar flattens its body to move under Pikachu and dodge the attack. Gengar uses Shadow Ball as Pikachu dodges. Gengar tries to use another Shadow Ball but Pikachu jumps on top of it and then uses Iron Tail to hit Gengar, sending it to the ceiling. Pikachu tries to use another Iron Tail but Gengar uses Double Team to completely surround Pikachu. Gengar uses Shadow Ball as Pikachu uses Thunderbolt to hit all the fakes and the real one. Gengar uses Shadow Ball again as Pikachu dodges before using Iron Tail to land another hit and tries to finish off Gengar with Thunder. Gengar uses Hypnosis and Dream Eater to finish it off. Ash says to Agatha that he's just not as strong as she is and Scott comments that Ash shouldn't expect to have beaten one of the Elite Four. Agatha explains that the real Gym Leader hasn't arrived yet so she was filling in for the time being.
Meanwhile, Team Rocket had been observing the battle and comment on how strong Pikachu really is. They decide to try and capture it as they lower their balloon behind the Gym. Once outside, Scott asks Ash if he is still interested in challenging the Battle Frontier and begins to explain how it works. He explains that there are seven Battle Frontier facilities that are run by Frontier Brains which are more powerful than Gym Leaders. There are seven total Battle Frontier Symbols that are given out, but he needs to earn six of them to find out the location of the secret seventh facility. Ash decides to challenge the Battle Frontier and Team Rocket decides that they will follow him to the Battle Frontier as well. Team Rocket grabs Pikachu with a mechanical grabber to steal it. Team Rocket recites their brand new motto for everyone. They try to get away but Agatha's Golbat uses Air Cutter to free Pikachu. Jessie brings out Seviper while James brings out Cacnea to attack. Seviper uses Bite while Pikachu uses Quick Attack to dodge and grab onto Seviper's tail to throw it. Pikachu uses Thunderbolt to send Seviper flying. Cacnea uses Pin Missile while Golbat uses Supersonic to send it back at them. Golbat uses Air Cutter while Pikachu uses Thunderbolt to send Team Rocket blasting off. Scott lets Ash know that they will be contacting him soon about the Battle Frontier, while Agatha says she will support him all of the way.
Ash returns to his home in Pallet Town and is greeted by his Mom, Misty, and Professor Oak. Misty shows Ash her Azurill that Tracy gave to her as an egg. Mr. Mime also greets Ash and is holding Ash's lunch that he prepared. Ash hears a car horn and looks outside to see that Professor Birch and Max have come to visit him as well.