XY10 redirects here. For the TCG release with the set symbol XY10, see Fates Collide (TCG).
XY009 : Clemont's Got a Secret!
Pokémon the Series: XY
XY011 : The Bamboozling Forest!
Mega-Mega Meowth Madness!
XY010   EP809
Harimaron VS Mega Mega Nyarth!!
First broadcast
Japan December 12, 2013
United States March 22, 2014
English themes
Opening Pokémon Theme (Version XY)
Japanese themes
Opening V(ボルト)
Ending X海峡Y景色
Animation Team Kato
Screenplay 武上純希 Junki Takegami
Storyboard 尼野浩正 Hiromasa Amano
Assistant director 古賀一臣 Kazuomi Koga
Animation director 案浦達哉 Tatsuya Annoura
Additional credits

Mega-Mega Meowth Madness! (Japanese: ハリマロンVSメガメガニャース!! Harimaron VS Mega Mega Nyarth!!) is the tenth episode of Pokémon the Series: XY, and the 809th episode of the Pokémon anime. It first aired in Japan on December 12, 2013 and in the United States on March 22, 2014.

Spoiler warning: this article may contain major plot or ending details.


While our heroes are in Lumiose City, Serena suggests they visit Professor Sycamore before they continue their journey, and she’s even made a batch of delicious macarons for the occasion. At the professor’s lab, they settle in with a nice cup of tea, only to discover the macarons are missing! They find the basket of treats in a corner, guarded by a very hungry Chespin who isn’t interested in sharing.

Meanwhile, Team Rocket has been researching Professor Sycamore’s studies on Mega Evolution, and the villains decide that stealing his data would be a big boost to their schemes. They break into the lab grounds, grab the professor, and throw him in the back of their truck. He’s not alone, however—Bonnie and Serena manage to sneak aboard before they drive away. The girls get locked inside by accident, but Serena manages to leave a trail of broken macarons—which Chespin quickly sniffs out, leading Clemont and Ash to the villains’ hideout!

In the meantime, James has plugged Professor Sycamore’s data into a mechanical Mega-Mega Meowth, which attacks our heroes! Chespin lets Clemont know it wants to battle, but neither Chespin nor Pikachu can make a dent in the mighty machine. But then, the Mega Blaziken that rescued Ash when he fell from Prism Tower reappears, along with its Trainer, a mysterious man in a Blaziken mask. Mega Blaziken’s incredibly powerful Flamethrower leaves Mega-Mega Meowth charbroiled, along with the actual Meowth who’s been controlling it, and Team Rocket is sent blasting off again. As our heroes head back to the lab with the professor, Mega Blaziken’s Trainer is watching over them—now without his mask. It’s Meyer, Clemont and Bonnie’s dad!

At the lab, Ash, Serena, Clemont, and Bonnie are saying their farewells when Bonnie notices Chespin watching them. Clemont thanks the Pokémon for its help against Team Rocket and says they’ll meet again soon, but it seems clear that Chespin wants to come along! And so, with Clemont’s friend Chespin now part of the group, the journey to Cyllage City continues!


The group are preparing to leave Lumiose City for Cyllage City and Ash’s next Gym battle. Serena makes a suggestion that they first visit Professor Sycamore, and everyone accepts the idea. Serena adds that she has a basket of freshly baked macarons for them all to enjoy together.

Meanwhile, at an abandoned warehouse, Team Rocket are reviewing their next scheme by watching a recording of Ash on Prism Tower and notices the Pokémon that saves him to be none other than a Mega Blaziken. Team Rocket then plans on making Meowth "Mega Evolve" to get Ash's Pikachu, while planning on stealing the research data from the Professor. While Meowth questions being able to Mega Evolve, James corrects Meowth that if they are successful in stealing the Professor's data, they can implement it into their new mecha, the "Mega-Mega-Mega Mecha Meowth".

Having arrived at the lab, Professor Sycamore learns that Ash and friends are traveling together now. Serena recommends Professor Sycamore try one of her macarons, and Sophie, one of the Professor's assistants, says that they should have tea. Professor Sycamore goes back to studying the Pokémon at his lab, saying that he will be back to have tea and macarons as soon as possible. As Sophie announces the tea is ready, Serena goes to take the macarons out when everyone notices they're gone. As everyone wonders where they went, Sophie notices a Chespin behind a plant eating all of the macarons. As she calls Chespin out for stealing them, Chespin stabs Clemont in the hand with his spikes, takes a handful of macarons and runs out. Sophie explains to the group that that Chespin is very gluttonous.

Outside the lab, Team Rocket pulls up in their van and ram their way inside. As Ash and friends hear the loud noise of the van breaking through the glass, Serena and Bonnie rush out to check on the Professor. As Team Rocket confronts the Professor, he remembers them from before, specifically the "talking Meowth." Jessie ends up trapping the Professor in a net before bundling him inside the van. Serena and Bonnie rush to the Professor’s rescue, though the van door shuts behind them and also traps them inside. Serena starts leaving a macaron crumb trail, allowing Ash, Pikachu, Clemont, and Chespin to follow the path directly to Team Rocket's hideout. Team Rocket open up their van, but are unimpressed to find the girls inside, and equally annoyed that about their copycat motto recital. Jessie and James immediately tie them up. Bonnie orders Dedenne to attack, but he is too busy sleeping. Meowth cuts to the chase, ordering Sycamore to hand over his Mega Evolution research. The Professor relents after suffering from headaches because of Meowth's claws scratching a glass pane. He directs Meowth to search his lab coat pocket, and inside Meowth finds a memory card.

As Ash and Clemont continue to follow the crumb trail, they pass Meyer riding on his motorcycle. Seeing his son in a panic, Meyer instantly suspects that something is amiss. As Ash and Clemont are going in to rescue the others, Chespin accidentally alerts Team Rocket to their presence when he tries to grab the basket of macarons. Team Rocket perform their motto, however they went ignored by the boys who turned their attention to saving their friends. The data from Professor Sycamore finally finishes downloading before Meowth steps inside the now activated Mega-Mega-Mega Mecha-Meowth. Sycamore and Clemont are impressed by the technology, but Serena reminds them that they need to escape. Chespin lags behind before tripping and dropping all the macarons on the ground. He puts his stomach first as the mechas continues to roll ahead. Luckily Clemont snatches Chespin to safety, taking shelter near the abandoned warehouse. Chespin offers him a macaron for his troubles, which Clemont accepts. Ash tells Pikachu to use Thunderbolt, but to no avail and the attack is reflected back at them. As Clemont tries to come up with a solution, Chespin directs his attention to the robot’s electrical plug. Chespin and Clemont manage to pull the plug from the socket, causing a temporary black out. James gives an order, and Meowth then activates the auxiliary energy supply. Team Rocket regains the advantage, until the mysterious Blaziken Mask has his Mega Blaziken turn the tables with a powerful Flamethrower. Ash and Clemont take care of the rest with Pikachu and Chespin, finishing the machine off with a combination of Electro Ball and Pin Missile to blast Team Rocket off and foil their latest scheme. Blaziken Mask and Mega Blaziken leap away just as quickly as they arrived, where it is revealed that the caped crusader is in fact Clemont and Bonnie's father, Meyer.

Back at Sycamore's lab, Sycamore thanks the group for their help. While Officer Jenny inspects the crime scene, the staff are already cleaning up the lab. Before the group can leave, Bonnie notices that the same Chespin has been spying on them the entire time. Professor Sycamore then tells Clemont that Chespin wants to travel with him, which Chespin confirms. Professor Sycamore gives him Chespin's Poké Ball, and Clemont recalls it inside, allowing Chespin to travel with them. The friends say their goodbyes to the Professor, promising to meet up again, before resuming their journey towards Cyllage City.

Major events

Clemont after receiving Chespin
For a list of all major events in the anime, please see the history page.


Pokémon debuts



Pokémon Quiz


Who's That Pokémon?

Who's That Pokémon?: Chespin (US and international)
Pokémon Quiz: Chespin (Japan)


The title card segment focuses on Bonnie for this episode


  • When Pikachu looks with perplexity at Chespin while it is hiding behind a plant, his tail is missing.
  • When Team Rocket gets through Professor Sycamore's laboratory, while breaking the wall, Zigzagoon's eyes disappear when they close, only leaving its mask there.
  • When Ash and Clemont approach Chespin, the lower-left spike on its head is colored brown.
  • When Chespin picks up a piece of macaron, its left arm and tail are briefly colored green.
  • In the scene where James is slamming on the computer, the keyboard is drastically oversized and its touch-pad is missing.
  • When James turns Mega Mega Meowth on, half of Jessie's glove is colored as her skin, making her glove appear shorter.
  • After Mega Mega Meowth is hit by Flamethrower, Chespin's arms are colored light brown.
  • In the Polish dub, the Pokédex uses a different voice filter than usual.

Dub edits

The Polish and Russian dub's title card segment
  • The Polish, Greek, and Russian dubs' title card focuses on Ash instead of Bonnie.
    • Also, the title card lacks the characters' shadows in the Greek dub.
  • James is not cut off by the opening like he is in the original version.

In other languages

XY009 : Clemont's Got a Secret!
Pokémon the Series: XY
XY011 : The Bamboozling Forest!
  This episode article is part of Project Anime, a Bulbapedia project that covers all aspects of the Pokémon anime.