Pokémon : Season 19

Champion Diantha visits Ash and his friends in order to discuss the prophecy foretold by Olympia. Diantha's Mega Gardevoir pushes Ash and Greninja to their limit.

Ash battles against Sawyer once again, who has earned all eight Gym Badges.

Ash battles against the Gym Leader Wulfric of Snowbelle City. Ash uses Hawlucha, Talonflame, and Greninja. Wulfric uses Abomasnow and Avalugg. However, the battle ends in a disastrous loss for Ash, who heads off by himself to answer the doubts in his heart.

Ash feels very bad after losing to Wulfric. While his friends search for him, an encounter with a certain Pokémon sparks a memory from Ash's past that reignites his passion.

Ash issues a rematch battle against Wulfric to obtain his eighth Kalos Gym Badge. He has a big challenge in front of him as he has to battle against Mega Abomasnow. With the help of Ash-Greninja, Ash defeats Wulfric and receives his eighth and final Kalos Gym Badge.

Ash and Alain continue their battle against Lysandre. They were successful in defeating Lysandre. Meanwhile, Chespie was absorbed by the Megalith Crystal in Lysandre Labs, which transforms into a giant Megalith Zygarde. The Megalith Zygarde was headed towards Anistar City to absorb the power from the Anistar sundial. This will result in a planetary apocalypse. Ash, Clemont, Alain, Malva, Steven Stone, the Kalos Gym Leaders, and the Kalos League Champion join forces to defeat the Megalith Zygarde

As the Kalos Gym Leaders are trying to stop the crystal, Ash and Alan are successful in saving Harimaron. The Crystal Zygarde is still able to function without Harimaron. They realize that Fleur-De-Lis is taking control of the crystal. With no other option, Puni-chan and Z-2 join forms with every Zygarde Cell in the world to transform into the 100% Zygarde Complete Form. The Zygarde Complete Form is able to destroy the Crystal Zygarde and kill Fleur-De-Lis in a devastating Core Enforcer move.

Citron successfully repaired Citroid. Due to Citroid's memory core being destroyed, it has no memory of its past and consequently no experience. Meanwhile, a returning Pokémon trainer asks for a rematch with Citroid.

After Lumiose City is getting rebuilt, Serena organizes a special Showcase performance in order to cheer up the residents that are feeling down because of what happened. And even though Serena is torn on what to do next, the eyes of the people she is making smile through her performance sends her thoughts in a specific direction. And after an unexpected turn of events leads to her having a battle with Ash, she makes a choice.

Ash and the others came back at the wetlands and after saying goodbye to Goodra, they run into the plants that were raging wildly during the Team Flare incident, but manage to drive them back with help from Ash-Greninja. But then Team Flare scientist Xerosic returns and abducts Clemont. After officially winning, they reunite with Squishy and Zygarde, who needs Greninja's powers, leaving Ash to choose for Greninja's destiny.

With their journey in Kalos finally over, Ash and his friends decide to part ways in order to walk their own respective paths. At the airport, the group promises to meet each other again someday, but when it is almost time to board the plane, Dedenne runs away as he doesn't want to part ways with everyone. Meanwhile, what is Team Rocket up to?

Professor Sycamore and Alexa explore some ruins, where they discover a stone statue of a woman named Aila, and a legend emerges. A collection of Kalos records reveals that Aila’s true love, Jan, attempted to vanquish the Destruction Pokémon Yveltal. When he failed, the land was drained of all life as Yveltal became a cocoon and turned Aila to stone.