Cilan states a "princess" sat on a pillar near there and Ash wants to get some ice cream, when Iris points out there is a "no ice cream allowed" sign. They go off to get some ice cream when Ash suddenly notices the Champion Cynthia. She informs them of a Pokémon World Junior Battle Tournament taking place in East Unova and invites them to come along. They accept when Cynthia asks for an ice cream.
Meanwhile, Team Rocket detects something in the bushes using goggles created by Dr. Zager. Jessie and James then unleash Woobat and Yamask and they use Air Slash and Shadow Ball to force Meloetta to show herself. Meowth then fires a net at Meloetta. She manages to avoid it, but gets hurt. She then escapes.
Meanwhile, they the group is driving Cynthia's truck to the shore. Iris begins to ask Cynthia a question, when Pikachu and Cynthia see Meloetta stumbling across the road. Cynthia stops and Meloetta collapses from the injuries earlier. Ash then recognises it as the Pokémon he saved from a falling billboard in An Epic Defense Force! and Cynthia indentifies it. They lay it down and Cyntia sprays it with Super Potion. She then has Iris and Cilan get an Oran Berry while Ash and Cynthia go to get ice.
They come to a lake and Cynthia calls her Glaceon. She then has Glaceon use Ice Beam on the lake to freeze it. She then recalls it and they collect the ice.
They return to Meloetta and Pikachu and Ash puts the ice on Meloetta's head. Cynthia then gets a phone call and is asked to leave, so Ash and Pikachu are alone. Ash's Oshawott then comes out of his Poké Ball and then develops a crush on Meloetta upon sight. Ash then sees the ice has melted and has Oshawott look after Meloetta while he gets some more ice.
Meanwhile, Iris and Cilan find some Oran Berries on top of a mountain and Iris realizes the rock is too broken to climb. She then has Emolga get the Oran Berries and they head back. They then find Ash and Pikachu working on the ice and so Iris sends Emolga to get the Oran Berry to Meloetta. They then ask Ash what's going on and he explains. Iris says Emolga is bringing the Oran Berry to Meloetta.
Emolga then finds Oshawott flirting with Meloetta and flies over when a gust of wind blows her into Oshawott's head and the Oran Berry gets near Meloetta. Meloetta then finds the Oran Berry and flies off. When Ash and the other get there, Oshawott and Emolga start fighting when Meloetta sings which calms them down. Cynthia then arrives and explains Meloetta's song and that without it, no one could be calm. Meloetta then leaves. Soon after, Iris challenges Cynthia to a battle and she accepts.
Meanwhile, Team Rocket searches for Meloetta. Meowth then finds it and they run after it.
Cynthia will use Garchomp and Iris will use Axew. Iris starts the battle with Scratch and then uses Dragon Rage, but neither attack is sucessful. Cynthia then has Garchomp use Dragon Rush and then Draco Meteor, both of which have an effect. However, Axew refuses to give up and immediatly learns Giga Impact, charging into Garchomp and doing some damage. Garchomp then uses Brick Break while Axew is recharging, and then has him stop. The battle is then called off.
Team Rocket searches for Meloetta at the airport to East Unova when Ash, Iris, Cilan and Cynthia come over to the dock and Meowth realizes Meloetta is following them. They then decide to contact Dr. Zager and then follow them. Meloetta watches Ash and the others invisibly. Cynthia informs Ash that he has an old friend waiting for him in Undella Town.
- Team Rocket's Pokémon Live Caster: Kyurem VS the Scared Swordsman: Keldeo
- Unlike the previous episode, Professor Oak did not appear at the beginning of this segment.
- Viewers could call one of three phone numbers to hear a mission from either Jessie, James, or Meowth. 10 random callers won a Nintendo 3DS.
- Prior to the start of the episode in the original Japanese airing, a clip of Ash, Pikachu, and the text saying "Pokémon Movie & TV Anime 15th Anniversary" (Japanese: ポケモン映画＆ＴＶアニメ １５周年), with multiple anime characters saying "Pokémon Anniversary", is presented. This was also shown before BW086: Rocking the Virbank Gym! (Part 2).
- Be an Arrow! replaces Best Wishes! as the opening.
- This is the first episode to feature an event legendary Pokémon in Dare da?, though the English version has had Mew as Who's That Pokémon? for The Dunsparce Deception.