Ash and his friends, continuing towards Coumarine City, stop for lunch. Serena goes to give the Pokémon the Poké Puffs, but notices they have been eaten. Chespin passes by, its mouth filled with food and gulps it down. Pancham comes and starts fighting with Chespin, so Serena and Clemont split them. Serena and Clemont scold them, but Chespin hits Pancham, taunts it and runs off. Pancham attacks Chespin, who dodges. Pancham tracks Chespin and both bump into a Farfetch'd. A Trainer named Nini scolds them, forcing Serena and Clemont to apologize for this disturbance, along with their Pokémon. Nini forgives them, focusing on training for her first Pokémon Showcase. Serena thinks of participating in it, making Nini, who is also a Pokémon Performer, admire her.
Nini tells she needs some feedback from the audience to see if she makes a good team with her Smoochum and Farfetch'd. Serena thinks she is not capable of judging the performance, but Nini insists she should give it a try. Smoochum starts with Powder Snow, creating a snow cloud. Farfetch'd flies up and cuts it, creating sparkles. After leaping, Smoochum uses Heart Stamp, which gets cut by Farfetch'd's Fury Cutter, ending the performance. The heroes are amazed and Nini tells them the theme of their performance, "a heartbreak". Nini asks for advice, so the heroes think the Pokémon should dance more, the Heart Stamp should be more flashy. Nini asks Serena to see her performance, wanting as an comparison. Serena goes to do so, but her Pancham gets tackled by Chespin, for he wants to perform as well.
Clemont's eyeglasses glow, as he made a new machine, a female Chespin dancing robot. He turns it on, which causes the robot to dance with Chespin, making him a bit nervous. The robot begins to malfunction, as it spins Chespin around and detonates. Serena starts her performance, throwing Chespin and Fennekin in the sky. Fennekin uses Flamethrower, which spins around Pancham, who makes air leaps and puts on his glasses. This causes Smoochum to blush. Team Rocket observes and Jessie plans on entering the Showcases and win the title of Kalos Queen. She targets Smoochum, wanting to use her in the performances. Pancham uses Dark Pulse, with Fennekin's Flamethrower spinning around it, creating a firework display. The heroes are pleased by the performance.
However, they admit Pancham's leaping does not fit with their dancing. Smoochum approaches Pancham and tries to kiss him. Nini feels they have the same air about them and thinks it would be good if they danced. Pancham and Smoochum dance, amazing the group with their performance. Nini proposes she could trade one of her Pokémon for Serena's Pancham, which shocks everyone. Chespin pushes Pancham around, so Clemont scolds Chespin. Serena declines the offer, for Pancham is the first Pokémon she caught, making Farfetch'd relieved. Team Rocket appear, disguised, advising Serena and Nini to take a course with Jessica for a lesson in choreography. Nini asks for some lessons, so Jessica thinks she can do this one voluntarily. Jessica has her attention on Smoochum, but is reminded to teach the lesson.
Jessica lifts the legs to practice dancing, followed by turning the body left and right sides. Jessica is exhausted, so James prepares a balloon, in which the Pokémon can practice dancing. Fennekin, Chespin, Pancham, Farfetch'd and Smoochum enter the balloon and are captured, as Team Rocket takes their disguises off. Team Rocket flies off, with Jessie stating she will become the Kalos Queen, even if the twerps will practice. Meowth drops a box, releasing smoke, which distracts the group, who do not see Team Rocket's balloon. Ash sends Fletchinder to track Team Rocket. While Team Rocket are pleased, Chespin and Pancham start hitting each other, causing a mess that allows the balloon prison to drop. After bouncing about, the balloon prison gets pierced by a branch, making the Pokémon freed, though in an unknown area.
Farfetch'd points at a distance, and as Pancham and Chespin fight, Fennekin goes away. They soon encounter James's Inkay, who summons its Trainer. Pancham and Chespin try to defend others, but fight each other. Inkay uses Psybeam, which knocks Farfetch'd and Smoochum out. Jessie's Pumpkaboo uses Shadow Ball, dodging Fennekin's Flamethrower and hitting it. Chespin and Pancham stop fighting, seeing the Pokémon hurt and team up. Pumpkaboo uses Dark Pulse, but misses. Pancham uses Arm Thrust on Pumpkaboo and passes through it, followed with Chespin's Pin Missile. Inkay goes to Tackle them, but Chespin uses Vine Whip to bind the vines on a tree, pushes itself and tackles Inkay. Inkay uses Psybeam, countered by Pancham's Dark Pulse. Pumpkaboo uses Leech Seed, countered by Chespin's Vine Whip. The heroes come to the scene and see the battle.
Pumpkaboo uses Shadow Ball, but Chespin and Pancham dodge, the latter throwing the former. Chespin uses Vine Whip to spin Pumpkaboo, allowing Pancham to hit it with Dark Pulse. Using Dark Pulse and Pin Missile, Inkay and Pumpkaboo fall down on Jessie and James. Pikachu uses Thunderbolt, blowing Team Rocket off in the sky. The heroes are pleased Chespin and Pancham are getting along, but they repeat their attacks on each other. Ash thinks if two people fight, they actually care about each other. Serena bids farewell to Nini, promising they will encounter in a Showcase as rivals. Serena aims on training Fennekin and Pancham for the Showcase as well.
