The gang is traveling via a ship to Slateport City. Ash sees his new badge he earned from Brawly. However, they need to arrive to Slateport where May is going to have her first Contest. However, the crew is actually Team Rocket in disguise, planning to capture the Pokémon. The crew gives the drink and offers Ash's Pikachu some food as well, to which he agrees, but is captured in a bag. Meowth and Jessie's Wobbuffet appear in Magikarp submarine as well.
Ash brings Corphish and he cuts the bag, releasing Pikachu. Jessie brings Seviper and it uses Poison Tail, but Corphish evades and uses Crabhammer. May sends her Beautifly and it uses Gust to send Team Rocket on the submarine. Pikachu uses Thunderbolt to blast them off.
After a while, Brock notices that the ship has been out of gas and a storm is approaching them. The waves drift them to an abandoned ship, where they must find a radio. Ash spots another, newer boat nearby, making it definite that someone else in on the ship. A man goes outside the ship, introducing himself as Tommy. The gang explains their problem, but Tommy says that he came to investigate and that his Marshtomp might be in the ship. Tommy will drive them as soon as he is done investigating the ship.
Tommy gave food and drinks to the gang. May's Torchic sees a door being opened and goes in. Torchic screams and the gang comes in, but Torchic disappeared. Team Rocket appears to be blasted off into the ship, but a Pokémon sees them. Meowth enters a room and is soon taken by the creature. The gang searches for Torchic, but as Max turns around, he is taken as well. Max wakes up, seeing that Meowth and Torchic are being tied.
As the gang continues, a door is being shaken and it opens, revealing some Azurill and Marill going. Max thinks that Meowth should cut him loose, but Meowth does not see how it affects him, so Max will free him when Meowth frees him. Max is freed and unties Torchic, but a lone Spinarak appears, capturing Max once more. Jessie and James search for Meowth, but suddenly a box begins to shake, making a Golduck release himself. As Jessie goes, James is being caught by the creature.
James is being tied to the place where Torchic, Max and Meowth are. Meowth tries to free James, but Max gets in the way, so nobody is untied. As the gang searches, May is pulled to the water. Brock brings Mudkip to search for May, but Mudkip does not see her. May is being caught as well, but Max cheers her up as Brock, Tommy and Ash search for them. Meowth and James remind them that Jessie's also left to search for them. Jessie wanders and sees a Wooper wandering, but the creature captures her as well.
The others make fun of Jessie being tied, so she tackles them. Meowth turns around and (unintentionally) tackles them. Jessie's Wobbuffet releases itself, but soon is tied as well. The gang searches for others, but the creature is about to grab Ash's Pikachu, but he uses Thunderbolt to defend himself. The creature is a Swampert. The Swampert goes away, with others following it. However, they lose it as it goes into the water.
Mudkip follows the Swampert, with others following him. They go to the other side and see an opened door. As they go inside, they see everyone tied up. Swampert attacks the gang with Mudshot, so Ash sends Corphish to battle and he uses Crabhammer, but is soon defeated with Swampert's Iron Tail. Tommy seems to think that the Swampert is his Marshtomp, but it evolved. Tommy attempts to persuade it, but Swampert uses Mudshot. Swampert is mad, but Tommy does not give up, as the Swampert thinks Tommy abandoned it. Team Rocket beg to be untied soon.
Tommy still attempts to persuade Swampert, but with little success. When it sees Mudkip, it remembers its days when it was a Mudkip - when it evolved into the Marshtomp and when it used Iron Tail. The Swampert forgives Tommy and everybody is untied. Team Rocket isn't missing an opportunity, so Jessie sends Seviper and it uses Poison Tail, but Swampert attacks Seviper, defeating it immediately.
Seviper uses Hydro Pump, blasting Team Rocket away. Tommy plans to set the place up for Water Pokémon. The gang supports Tommy's idea and they ride off to Slateport City.
- Featured Pokemon: Silcoon
- When it showed Max waking up, finding himself captured in Spinarak's String Shot, along with May's Torchic and Meowth, it showed they looked to be at least ten feet in the air. However, when Meowth cut Max loose, it showed Meowth and Torchic to be low enough for Max to reach up and attempt to help May's Torchic down. This was repeatedly shown through the episode as the captured were shown again and again to be at least ten feet in the air.
- Near the end of the episode when Tommy was taking everyone to Slateport, May says she's excited for her Contest, and Ash says he's excited for his Slateport City Gym battle, though there is no Gym in Slateport. He may have been referring to his battle with Wattson in Mauville City.
- Ash's Badge case, consisting of a red Poké Ball silhouette, does not get changed into a red rectangle.