Ash and Barry stand outside the Pokémon Center and practice their moves. Dawn follows them out and states that she doesn’t know any rules for the Pokémon Ping Pong competition. Barry explains that the trainer uses a paddle and the Pokémon uses a part of their body. At the registration area, Ash and Dawn sign up to participate in the competition, and go to the ping pong tables to do a practice match. As they are playing, Ambipom makes an incredible save and strikes the ping pong ball with incredible force, sending the ball flying towards a passerby. The passerby catches the ball and compliments Dawn for her Ambipom’s incredible skill.
In the stadium, Barry mentions that the guy that Ash and the team saw when practicing was the winner of last year’s competition, and says that he will defeat last year’s winner with his overwhelming power. In the stands, Brock finds a seat with Piplup and meets James under disguise. Brock doesn’t recognize that the disguised James is from Team Rocket, and they get along well. As the competition begins, the announcer shows the prize of a trophy of solid gold ping pong balls and Pokémon food. Ash and Dawn encourage each other at their tables, and Jessie is told that Meowth is not able to hold a paddle as per the rules.
The tournament begins, and Jessie and Meowth are on the receiving side of the serve. Meowth uses Fury Swipes and slices the ball in three pieces, and is disqualified. At Ash’s table, Ash loses the point on the first volley after being unable to return the hit from his opponent’s Farfetch’d. At Dawn’s table, although she loses her first point due to being unable to find out which hand her opponent’s Alakazam is going to strike with, she recovers from her downfall by getting the next point using Ambipom’s incredible power. The scene then shows cuts from many different people’s matches, and shows Ash losing on the first match. Dawn and Barry manage to win their first few matches. Afterward, Dawn defeats the team Jessie and Meowth got disqualified to, but Barry loses to last year’s winner. Finally, the finals for the A Block winner come up as Dawn facing last year’s winner. Dawn breaks her paddle mid-way into the game, but Ambipom manages to cover for her.
The scene then switches to the Pokémon Center where Dawn is waiting in front of the healing room. Through the television, the announcer says that last year’s winner defeated the winner of Block B to become the champion again this year. Nurse Joy says that Ambipom was merely exhausted, and Dawn apologizes for putting so much responsibility on Ambipom’s shoulders. Then, the winner of the Pokémon Ping Pong competition comes up to Dawn and says that he wants to train with Ambipom and take it to the top. He asks Dawn to think about it and walks off.
In the next scene, Dawn rushes into Ash and Brock’s Pokémon Center room and tells them that she cannot find Ambipom anywhere. They go to the back of the Pokémon Center after hearing an unusual sound, and sees Ambipom practicing ping pong against the wall of the building. Dawn tells the others about the offer she received a while ago, and asks for Ash’s advice. A flashback plays of how Ambipom was an Aipom before it evolved, and the journeys it had with the team to reach this point. Brock says that the trainer must determine what is best for the Pokémon, and Dawn thanks Brock for his advice.
The next morning, Dawn rushes out and lets the competition winner know that she wants Ambipom to select what it wants to do. For a while, Ambipom takes a ping pong ball, Pokéball, Dawn’s hat, and Ash’s hat, and juggles them around. Finally, Ambipom returns everything except the ping pong ball, declaring that it wants to play Pokémon Ping Pong. As Ambipom departs, the team is shown waving at Ambipom and the car it is leaving in.