XY137

Battling with a Clean Slate! (Japanese: はじまりはゼロ！シトロンの決断！！ Starting from Zero! 's Decision!!) is the 137th episode of the, and the 936th episode of the Pokémon anime. It first aired in Japan on October 6, 2016 and in the United States on December 24, 2016.

Blurb
The Lumiose Gym has been through a lot, but everyone is working together to get it up and running again. Clembot is back, too, although Clemont hasn’t been able to restore its memories. When someone arrives to challenge the Gym, Clembot experiences its first Pokémon battle all over again—and it loves every minute! It asks Clemont to teach it all about Pokémon, and he’s pleased to start rebuilding their friendship.

The rest of our heroes are making plans, too. Ash wants to go home for a fresh start. Alain returns to work for Professor Sycamore. And Serena remembers Palermo’s offer to take her on as a student...

Plot
Following the Team Flare incident, Lumiose City is getting back to normal whilst, and  work to rebuild the Lumiose Gym alongside Meyer and hope to get it up and running again the next day. is busy working on a new Clembot and manages to get it working, and the two introduce themselves. In a cafe, is speaking to, who has heard of Team Flare's downfall, and Team Rocket take a lot of credit for bringing it down. Giovanni requests a full report, and the trio promise to return to Headquarters once the airport reopens, and decide to bring back a surprise for him as well, in the form of.

Joining the others in their conversation, Clemont informs them that the new Clembot has none of the memories of the old Clembot. As they talk, a called Alvin shows up to challenge the Gym, who having watched the Lumiose Conference, is excited to meet Ash in person. Clemont introduces himself as the Gym Leader, causing Alvin to wonder about Clembot. Clemont explains the entire incident of Clembot's destruction, causing Alvin to be sad; Alvin explains he had previously challenged the gym, but was defeated, and has been training hard since then so he can battle Clembot again. Clemont explains that Clembot won't have any memory from before, but Alvin is intent on his wish. So, due to the battlefield not being ready, Clemont asks Alvin to come back the next day to battle, and Alvin agrees. After he leaves, Meyer informs the group that Professor Sycamore has called them to meet Alain who is coming back.

At Professor Sycamore's lab, a clumsy Mairin is seen tripping over Chespie when Ash and arrive. Mairin is surprised to see them and explains that she has decided to throw a party on account of Alain's homecoming. Clemont and Bonnie smell something burning. In the kitchen, Mairin moans about the burnt food as the others offer to help prepare for the party. Professor Sycamore drives a still distant Alain back to his lab. As the others prepare for Alain's return, Bonnie can't help but wonder how Squishy is doing but Ash assures her that Squishy shall be doing fine. Later, Alain and Professor Sycamore return and Mairin welcomes him home.

During their lunch, and  get into another fight over food, but Chespie manages to break it up. Professor Sycamore hears the Lumiose Gym is reopening and Bonnie informs him about the challenger. Professor Sycamore inquires the group on their future plans, and Ash claims that he plans to return to Kanto and start his journey afresh. Later, Alain visits the Pokémon in Professor Sycamore's lab, who are pleased to see him. Ash joins him, saying it's been a while since he saw them. comes over and greets Alain as well, as Ash asks Alain what his plans for the future are; the latter, who still feels guilty over helping Lysandre even though he was unaware of his true intentions, is unsure. Ash tries to cheer him and asks him to battle again in the future. Alain promises to do so, just as an alarm starts blaring. Joining the others, they discover that Team Rocket has captured Pikachu. After reciting their motto, Jessie and James send out and  to battle Ash's Greninja and Alain's Charizard. A battle ensues, during which Greninja frees Pikachu with and destroys the device. With the efforts of Greninja and Charizard, Team Rocket is sent blasting off, and Ash thanks Alain for his help.

The next day, Clembot is ready for his battle against Alvin. Meyer acts as the referee, and the battle begins with Clembot sending out for the battle. Alvin responds by sending out his as Clembot comments that Vivillon is at a disadvantage against Magnemite. Magnemite starts the battle with, but Vivillon counters with to blind Magnemite, and uses. As Clembot wonders what to do, Clemont tells him to remain calm, focused and observant to predict his opponent's next move. As Clembot tries to reflect on Clemont's advice, Alvin has Vivillon put Magnemite to with  and knock it out with an. Clemont reminds Clembot to not get nervous and keep his eyes open at all times. Clembot sends out as the next Pokémon. Vivillon starts with Sleep Powder, but Magneton uses to dispel the Sleep Powder, and knocks out the Scale Pokémon with. Next, Alvin uses to attack with, but another Thunder quickly faints Pyroar. Clembot claims to Clemont that the feeling of victory is good, as Alvin sends out as his last Pokémon. The Lonely Pokémon starts the round with, which Magneton counters with. Cubone successfully knocks the Magnet Pokémon out with. As Clembot recalls Magneton, Clemont says it is upsetting to lose but adds that by losing, one can learn to become stronger. Clembot takes his advice and sends out. Determined to get the, Alvin commands his Cubone to use Brick Break, but the Generator Pokémon dodges the attack. Clembot commands Heliolisk to use, but Cubone blocks and uses. Heliolisk counters with, heavily damaging Cubone. A determined Alvin remembers Clembot's advice from before, and commands Cubone to use Bonemerang. Heliolisk counters with Focus Blast but the Bonemerang breaks through and knocks out Heliolisk, giving Alvin the win. Clembot claims that he found the battle to be enjoyable, and gives Alvin his Voltage badge. Ash congratulates Alvin, and Serena and Bonnie commend Clembot and the Pokémon for their brilliant battling skills. Clembot thanks them for the cheer, and informs Clemont that he wishes to learn more about Pokémon, which Clemont happily agrees to.

Later, Professor Sycamore takes it upon himself to give away the medals to the Kalos League finalists due to the Kalos League award ceremony never being completed. Bonnie suggests awarding everyone for their efforts in stopping Team Flare instead of just Alain and Ash, which is well appreciated. Giving Ash and Alain their medals, the Professor invites Alain to be his assistant again; however, the latter is still unhappy and guilty of his work with Team Flare and declines. Professor Sycamore tries to convince him by stating that he and Lumiose City could use his help, and Alain finally accepts. Later the group, along with their Pokémon, receive medals for their assistance and a photograph is taken. That night, a crowd gathers around Prism Tower to witness the Gym reopening. A countdown commences and Meyer pulls a switch to turn the lights on and the fireworks go off. As they celebrate the Gym reopening, Clemont asks Serena what her future plans are, but she states that she is not certain, as she remembers Palermo's offer from before.

Major events

 * rebuilds Clembot and reopens the Lumiose Gym.
 * plans to return to the once the  Airport reopens.
 * reveals that he is planning to head back to Pallet Town.
 * Clemont's Magneton is revealed to know, , and , while his is revealed to know.
 * Professor Sycamore gives medals to Ash,, Alain, Mairin, and their Pokémon for their heroic efforts against Team Flare.
 * Professor Sycamore requests Alain to become his assistant again.
 * considers accepting the offer that Palermo made to her earlier.

Humans

 * Jessie
 * James
 * Professor Sycamore
 * Alain
 * Mairin
 * Meyer
 * Palermo (flashback)
 * Sophie
 * Cosette
 * Alvin
 * Meyer
 * Palermo (flashback)
 * Sophie
 * Cosette
 * Alvin

Pokémon
Who's That Pokémon?: (US and international) Pokémon Quiz: (Japan)
 * ('s)
 * (Professor Sycamore's)
 * (Mairin's; Chespie)
 * (Alvin's; )
 * (Alvin's; female)
 * (Alvin's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Squishy; flashback)
 * (Z2; flashback)
 * (×3)
 * (female)
 * (Professor Sycamore's)
 * (Mairin's; Chespie)
 * (Alvin's; )
 * (Alvin's; female)
 * (Alvin's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Trainer's)
 * (Squishy; flashback)
 * (Z2; flashback)
 * (×3)
 * (female)
 * (Z2; flashback)
 * (×3)
 * (female)
 * (×3)
 * (female)
 * (×3)
 * (female)
 * (female)
 * (female)
 * (female)

Other

 * Clembot

Trivia

 * Poké TV: "Pokémon 24 Hours!" focusing on Professor Sycamore and his.
 * The English dub was released on iTunes and Amazon Video on December 18, 2016, six days before the episode aired in the United States. The same occurred for all episodes in Volume 4 of Pokémon the Series: XYZ that aired after an all-day marathon of  on November 26, 2016, and before January 11, 2017, when the error was fixed (The Right Hero for the Right Job! through Till We Compete Again!).
 * This episode was followed by a preview for the.
 * This is the final episode of the to feature a character of the day.
 * This episode marks the last time blasts off in the XY series.
 * This episode marks the first time that Alain's Charizard is shown not wearing its Charizardite X, and also the first time outside of flashbacks that Alain is shown not wearing his Mega Ring.
 * This episode marks the first time in the when  is used by a Pokémon other than.
 * Mad-Paced Getter is used as an insert song at the end of Alvin's Gym battle.
 * Brilliantly is used as the ending for this episode, with this version being sung by 's Japanese voice actor, Yūki Kaji.

Errors

 * When Professor Sycamore and Alain arrive at the laboratory, Serena's Braixen's ear tuft is shown to be behind Serena, but when the shot changes, it isn't.
 * When Ash commands to use, Jessie commands  to use , but she uses  instead.
 * When Serena's Braixen uses Flamethrower on Gourgeist, Ash, Ash's Pikachu and Greninja, Alain and Alain's Charizard disappear from standing in front of the rest of the group only to reappear when Pikachu is commanded to use Thunderbolt.
 * When Cubone's is about to hit Heliolisk, the upper part of Heliolisk's mouth is colored yellow instead of black.
 * In the dub, Alvin commanded Vivillon to use when it was actually.
 * When Vivillon uses Sleep Powder, the top half of its head is colored light gray like the bottom half of its head for a frame.

In other languages
Ein unbeschriebenes Blatt! EP940 XY137 XY136 XY編第137話 精灵宝可梦 XY 第136集