While travelling through the woods, Ash and friends discover a small green Pokémon in Bonnie's bag that the Pokédex cannot identify. Bonnie decides to name the Pokémon "Squishy", but they are soon interrupted by a mysterious team with strange eyewear, who seem interested in taking Squishy for themselves.
As the gang continue their travel with their new Pokémon friend, "Squishy", a Quilladin appears and falls head over heels for Eevee.
Ash and his friends run across Nurse Joy, who is stuck in a crevice. After helping Nurse Joy get back to the Pokémon Center they find out that Nurse Joy and her Audino don't always get along, and that Nurse Joy hopes that the Mega Stone that she found will help create a deeper bond between the two.
The gang come across a Litleo arguing with a Pyroar. When they learn it is time for Litleo to become independent, they decide to watch it from afar. Team Rocket has other plans however.
As the heroes and Team Rocket go to sleep, a Darkrai appears and casts dream spells on them, placing Pikachu and Meowth in Squishy's dreams. The two begin to see the past and future of Squishy as well as the gang's Pokémon.
The gang meet up with their ninja friend Sanpei, who invites them to his village for a festival, but they soon get interrupted when an army attacks and kidnaps the head of the town.
As the gang fight off against the evil ninjas, help soon starts to rise when Ash's Greninja retrieves a power.
Serena gets ready for her next Pokémon Showcase performance and hopes to get her third and final Princess Key along with her Eevee.
Ash and the gang arrive at Terminus Cave, but Team Flare appears and attacks the gang in an attempt to retrieve the Zygarde Core.
After Squishy runs off during the battle in Terminus Cave against Team Flare, Bonnie is worried about it. Ash and the gang cheer her up by searching for it.
Noibat meets a Breloom and accidentally messes with its flowers, which causes Breloom to be mad at Noibat. Noibat also meets a Floette, which it becomes friends with quickly. However, Breloom is angrier at Noibat, and they both get into a fight.
Serena, Ash, Bonnie, and Clemont go to a dance party, where they meet up with Kalos Queen Aria and Miette for a magical ball.
Ash battles Sawyer again. Another trainer named Alain, accompanied by his Mega Charizard, sees the unique power of Ash's Greninja and challenges him to a battle.
Team Flare chase another Zygarde Core, who has a more powerful part. However, Team Rocket is also pursuing the other Zygarde Core. To capture the other Zygarde Core, Team Flare gets assistance from Alain the Mega Evolution Trainer.
While traveling in the wilderness of a valley, the gang are confronted by a boy named Henny and a Chesnaught.
Serena gets ready for her next Pokémon Showcase. She hopes to win her third and final Princess Key required for the Master Class. However, a new Performer appears and poses to be the greatest test of Serena's performance skills. Meanwhile, Palermo watches Serena in the Pokémon Showcase.
The gang travels to the mountains, where an encounter with the Legendary Pokémon Zapdos led to Noibat evolving into Noivern in order to prove himself by saving Hawlucha from Zapdos.
The gang come across a jewelry store manager and a thief who share the same Pokémon known as Binacle.
Serena and her Pokémon are ready to perform in the Master Class for first place. She faces a tougher challenge when her rivals, Miette, Shauna, Jessie, and Nini are also competing in the Master Class for first place.
After making it through the Master Class past her rivals, Serena finds out that she has to challenge Aria in order to become the future Kalos Queen.
A new friend who gets along well with Clemont makes Bonnie feeling left out and jealous.
Ash comes down with a fever. Serena decides to stand in for him when Jimmy the guitarist challenges Ash to a Pikachu vs Pikachu battle.
Alain encounters the gang at the Pokémon Center. Ash and Alain once again have a battle.
The gang helps an alternately-colored Phantump find its way back home after Team Rocket had separated it from the other Phantump.
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.
Our heroes are visiting the wetland where Ash's friend Goodra now lives when they run into a group of Carbink with a problem-one of their Carbink friends is playing a trick on them, hiding and refusing to come out! Everyone joins the search, but the Carbink are lured into a trap and used as part of a Team Rocket robot! Feeling bad about the trouble it's caused, the mischievous Carbink teams up with Goodra to free its friends and send the villains blasting off again. Meanwhile, Alain has just defeated Gym Leader Korrina for his eighth badge, and he hopes to face a ...
Ash, Serena, and Bonnie are having a tough time keeping up with Clemont! Where is he going in such a hurry? It's the Gadget Festival, where playful inventors exhibit their mechanical creations-and where Clemont is truly in his element! Team Rocket is celebrating with some gadgets of their own, but as usual, their goal is to steal Poke Balls from unsuspecting Trainers. When Ash and friends hear about this scheme, they confront the villains, who attempt to fight back using a Meowth-enhancing gadget that Clemont finds impressive! But when Team Rocket's invention falls a ...
After meeting up with old friends, Ash starts battling in the Lumiose Conference and he faces Alan as first his first opponent..
At the Kalos League, Sawyer and Tierno battle against each other. The winner will battle at the semifinals against Ash or Allan.
Ash battles Sawyer in the semi-finals of the Kalos League.
Ash competes with Sawyer in the semi-finals of the Kalos League.
The day before the Kalos League finals between Ash and Alain, our heroes meet Alain's young friend Mairin when she rescues Clemont's wayward Chespin! Team Flare is also in Lumiose City, preparing for a secret operation while all eyes are on the League-and Lysandre has plans for Ash once the League is over. Meanwhile, Professor Sycamore, who has been researching Ash-Greninja, shows our heroes an old manuscript describing the mysterious Bond Phenomenon, which requires Trainer and Pokemon to have a particularly close connection. Afterward, Ash rallies his Pokemon for the...
The Kalos League Final continues and it is getting tense. With Alain just having Bisharp and Charizard left, Ash has the upper hand with Goodra, Pikachu and Greninja still in reserve. With Pikachu already worn out after taking out Tyranitar and Metagross, it may not last long. Who will emerge triumphant in this battle and become the Kalos League Champion?
Alan beats Satoshi and wins the Kalos League. Meanwhile, Flare-Dan prepares to move ahead with their plan of controlling Zygarde.
Fuladari and the Flare-Dan's plan for a beautiful new world has finally begun. Everyone from Satoshi to Alan is caught in the crossfire and soon Satoshi gets captured by Fuladari. Meanwhile Puni-Chan prepares to fight Z-2 in order to snap him out of the Flare-Dan's control.
Team Flare continues on changing the world and ruining Luminous city. Ash and his friends are in trouble.
As Ash and the gang are separated each one is trying to help others in different ways.
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. The Zygarde Complete Form repairs the damage caused by the battle. Puni-chan shares a tearful goodbye with Eureka before returning to the planet with Z-2.
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.
Cilan visits Kalos to sight-see and enters a fishing competition. Clemont uses a fishing machine. Cilan calls it deplorable and dismisses him as ignorant. Although unimpressed with his company, Cilan agrees to being shown around Lumiose.