The mysterious Masked Royal and his partner Incineroar star in the Battle Royal, an Alolan tradition in which four Pokémon battle until the last one standing is the winner. Ash, watching on TV, can’t wait to get in on the action—and the next day, he gets his chance! At the Battle Royal Dome, Ash’s Litten charges right into the ring, determined to take on the impressive Incineroar. The Masked Royal accepts Litten’s challenge and invites Sophocles and Kiawe to round out the four. He defeats them all, but Litten is fired up—and during an unexpected rematch the next day, it evolves into Torracat!

The episode was rated 7.43 from 21 votes.

In Kiawe's farm, a man named Viren appears who comes up with an idea to make a resort hotel by purchasing the farm.

The episode was rated 7.44 from 16 votes.

Our heroes are having a sleepover at Professor Kukui’s house, and Professor Burnet agrees to join them! Everyone has a good time, but there are a couple of hiccups: during a game of Z-Move poses, Kiawe accidentally unleashes Turtonator’s Inferno Overdrive in the living room, and then Professor Burnet’s Munchlax eats everything she cooked for dinner! That night, when Lillie has trouble sleeping, she talks with Professor Burnet, who offers some advice about her family. The next day, Nebby unexpectedly whisks her away to visit her brother—and his partner, the mysterious Silvally, who leaves her terrified and apparently unable to touch Pokémon again!

The episode was rated 7.45 from 22 votes.

After dreaming that he made a promise to the Legendary Pokémon Solgaleo and Lunala, Ash has a hard time waking up. On his way to school, he’s sidetracked by Tapu Koko, who guides him to a strange little Pokémon that looks like a cloud of stars. Lillie nicknames it Nebby, and Ash remembers his dream: he promised to take care of it! This attracts the attention of Lillie’s mother, Lusamine, the head of the Aether Foundation. She and her colleagues come to meet Nebby and offer to take care of (and research) this unknown Pokémon. But Ash is resolute in his promise, so Nebby’s identity is a mystery for now!

The episode was rated 7.56 from 25 votes.

The Pokémon School class is sculpting with clay today! But while our heroes muse about various Pokémon and places, they disappear one by one—first appearing at the scenes of their musings, then reappearing back at school! They soon realize Nebby had used Teleport to take them to the places and Pokémon they were thinking about. Meanwhile, Team Rocket is determined to catch Nebby. They succeed, but thanks to Teleport, Bewear carries the trio off...and Nebby makes its way back to Ash—all by itself! After Ash and Pikachu visit the places the rest of the class saw earlier, one thing becomes obvious: Nebby is growing up!

The episode was rated 7.59 from 22 votes.

Our heroes have made it through the Ultra Wormhole, but when they find the captured Lusamine, they’re shocked to find she wants nothing to do with them! With an Ultra Beast controlling her mind, it’s up to Lillie, Ash, and friends to rescue her. Their Pokémon spring into action—but so do Lusamine’s Pokémon, who are also under the Ultra Beast’s control. Lillie gathers her courage and reaches out to Clefable, recounting the fun they had together in years past. Her reassuring persistence pays off, and Clefable breaks free of the Ultra Beast’s control. Meanwhile, riding on Solgaleo’s back, Ash presses on to find Lusamine—and the Ultra Beast.

The episode was rated 7.60 from 20 votes.

Thanks to Acerola’s help, Ash arrives at the Ruins of Abundance, home of the Ula’ula Island Guardian Tapu Bulu. Ash wants to train with Tapu Bulu to prepare for his rematch against the Island Kahuna Nanu, and after our hero demonstrates his friendship with his Pokémon, Tapu Bulu springs into action! Showing immense power, the Island Guardian engages Ash and Lycanroc in battle. Lycanroc learns how to use Stone Edge! As the bond between Ash and Lycanroc grows, Tapu Bulu returns to its nap, satisfied that the training session was a success!

The episode was rated 7.63 from 16 votes.

Ash has been training hard, preparing for his rematch against Nanu on Ula’ula Island. But when he tells the kahuna he’s ready, Nanu has another idea. Team Rocket has just come looking for the Twerp so Mimikyu can try out its new Z-Move against Pikachu, so Nanu sends him out to battle them instead! Mimikyu proves to be a powerful opponent, but Pikachu overwhelms the opposition with a new move, Electroweb, and the Z-Move 10,000,000 Volt Thunderbolt. Ash wins, setting the stage for his Ula’ula Island grand trial!

The episode was rated 7.64 from 14 votes.

Following their journey through the Ultra Wormhole, our heroes return to the Pokémon School, where Lillie thanks everyone for their help saving her mother. Later, during a walk on the beach, Professor Kukui asks Professor Burnet to marry him! They aren’t planning a wedding ceremony, but our heroes have other ideas...a surprise ceremony awaits! Then, Lusamine asks the Pokémon School class to join the Ultra Guardians—a group that protects Alola from Ultra Beasts. And just after the bouquet toss, Solgaleo appears! Ash gets his wish and thanks the Legendary Pokémon for all its help, and he looks forward to seeing it again someday.

The episode was rated 7.68 from 19 votes.

The Ultra Guardians, along with Faba and Professor Kukui, are attempting to return The Blinding One to its original form! As Necrozma in its “UB Black” form, it’s holding Solgaleo captive and threatening Poipole’s home world. Our heroes have been attempting to “feed” Necrozma with Z-Power to restore its light, but it’s not enough. That’s when the people of Alola band together to send their own power to Necrozma—and it works! The Blinding One is restored, and Solgaleo is released. Poipole’s world is renewed, too, and Poipole decides to stay behind to protect it. As a goodbye present, it draws a loving portrait of Ash and Pikachu!

The episode was rated 7.69 from 13 votes.

Lillie can touch Pokémon again! While our heroes celebrate, a disgraced Faba is determined to prove himself to Lusamine by summoning an Ultra Beast—the same one that threatened Lillie years before. He kidnaps Nebby and convinces it to teleport him into his research lab at Aether Paradise. Ash, Gladion, Lillie, and Lusamine go after Faba, arriving just as a panicked Nebby transforms into a chrysalis and the Ultra Wormhole begins to open! The Ultra Beast known as UB-01 Symbiont emerges and attacks Lillie—but Lusamine throws herself in front of her daughter, and the Ultra Beast engulfs her instead and takes her back through the wormhole!

The episode was rated 7.70 from 23 votes.

Our heroes are in shock after Lusamine’s disappearance through an Ultra Wormhole, and they want to help get her back. But Gladion insists it’s a family matter, and he and Lillie set out on their own rescue mission. The Pokémon School class still wants to help, though, so Kahuna Hala directs them to the Altar of the Sunne on Poni Island. Meanwhile, nearing the altar, Gladion and Lillie encounter a Totem Kommo-o! With Snowy and Silvally, they defeat the Dragon-type Pokémon. Then, when the siblings rejoin the rest of our heroes, Ash again tries to convince Gladion to let everyone help. And when Lillie agrees, Gladion finally understands…

The episode was rated 7.81 from 21 votes.

After accidentally seeing Gladion and coming face-to-face with Silvally, Lillie is once again unable to touch Pokémon—but she’s determined to change that! With Nebby’s help, she embarks on a journey to recall the memories behind her fear. But Faba wants none of it, having been responsible for Silvally’s creation in the first place. Vowing to make sure Lillie never remembers her past, Faba captures her, and she’s again filled with fear. But Silvally rescues Lillie, and when she remembers that it was the one who saved her in the past, her fear of touching Pokémon finally vanishes!

The episode was rated 8.00 from 22 votes.

Our heroes are battling hard against a group of mind-controlled Pokémon, and Lusamine is still resisting rescue. When Gladion realizes their attacks won’t stop until the Ultra Beast is defeated, Ash suggests the two of them use Z-Moves. Instead, Gladion and his Pokémon provide a distraction while Ash and Pikachu use a powerful new Z-Move: 10,000,000 Volt Thunderbolt! This finally defeats the Ultra Beast, and after Lillie pleads with her mother to wake up, Lusamine is finally herself again. Returning through the Ultra Wormhole, our heroes and Lusamine are reunited with Professor Kukui and Professor Burnet, and Lusamine gratefully gives credit to our heroes for saving her.

The episode was rated 8.10 from 21 votes.

Our heroes are all gathered at the Altar of the Sunne, along with all four of Alola’s Island Guardians. Lillie and Gladion ask the Island Guardians for help to rescue their mother, Lusamine, who has been taken through an Ultra Wormhole by a mysterious Ultra Beast. After Tapu Koko and the others perform a ritual, little Nebby evolves into the mighty Solgaleo—one of the Legendary Pokémon of Alola! At Solgaleo’s invitation, the Pokémon School students climb onto its back. With the help of a new Z-Move, Solgaleo opens an Ultra Wormhole and carries them through, off to rescue Lusamine from the Ultra Beast!

The episode was rated 8.26 from 23 votes.