Pokémon : Season 20

Ash and Pikachu arrive in the Alola region with his mom to discover new Pokemon and new Alolan forms. Ash enrolls in Pokémon school to learn about them. The night before Ash's mother returns to Kanto, Tapu Koko appears and gives Ash a Z-Ring.

Having arrived at his new Pokémon school, Professor Kukui, who is the teacher, and its students host a surprise welcome party for Ash. Soon after, the guardian Pokémon, Tapu Koko, pays another visit to Ash to battle Pikachu. Tapu Koko teaches Ash how to use the Z-Ring. Ash and Pikachu manage to unleash the Z-Move, Gigavolt Havoc, but the Z crystal is soon shattered after Pikachu's immense release of power. In order to regain the power of Z-moves, Ash decides to go through the island trials.

Professor Kukui gives Ash an intelligent Rotom Pokédex that is capable of human speech. Ash goes to find and catch his first Pokémon in Alola, but he instead encounters Team Rocket, who are aided by a wild Mimikkyu that despises Pikachu.

After Ash fails to capture two wild Pokémon, he encounters a Rowlet that lives in a Pikipek nest. After Ash feeds the starving Rowlet, it returns the favor by helping him fend off Team Rocket away from its nest. Afterwards, Ash catches Rowlet as his first Pokémon in Alola.

Ash helps Lana train her Popplio to blow a water balloon large enough to enable undersea travel for people. During a school fishing trip, the class's Ride Pokémon are stolen by Team Rocket. However, Popplio manages to blow a massive balloon to save all the Ride Pokémon from falling on the rocks.

Ash and Sophocles are separated from their Pokémon during a visit to the local shopping mall.

Ash decides and fails to catch a stray Litten that continues to give him trouble.

Ash's class is assigned to look after a newly discovered Pokémon egg. When the class deliberates who will bring the egg home for the night, Lillie agrees to take care of the egg in order to overcome her fear of handling Pokémon.

Ash meets Hala, the Kahuna of Melemele Island, who created his Z-Ring. As part of Ash's first island trial challenge, Hala tasks him with finding a solution to an infestation of Rattata and Raticate without fighting them. By his friends' suggestion, Ash decides to recruit the local Yungoos and Gumshoos. However, Ash must defeat their leader in battle in order to earn their cooperation.

The time has come for Ash to confront Hala to win his first island Grand Trial challenge in Alola using the Z-Crystal he obtained from the Totem Gumshoos.

Ash and Pikachu visit Kiawe's family on the Akala Island, where they run a dairy farm. Team Skull interferes when Ash and Kiawe are on their way for a special delivery.

Professor Kukui takes Ash and the other students for a special lesson at the beach, where they come across a bunch of Mareanie. One Mareanie causes trouble for Ash and his Pokémon when it decides to help Team Rocket (and especially James), who are under pressure from their boss to catch new Pokémon in the Alola region.

Mallow tells Ash about the Great Alola Pancake Race and suggests that he join in. Ash agrees and finds his main rival to be the Pancake shop owner, who has an Alolan Raichu. During the race, Team Rocket, who want the grand prize of a year's supply of free pancakes, enter both Mimikyu and a mechanical Bewear powered by Meowth and Wobbuffet; Mimikyu is disqualified for using a Pokémon attack against Pikachu and the mechanical Bewear later self-destructs, and Team Rocket is carried off once again b

Lillie's egg hatches into an Alolan Vulpix, which she had named "Snowy" in the previous episode, and their principal's egg into a normal Vulpix. The fire-type Vulpix starts playing with Pikachu, Togedemaru, Popplio and the others, while Snowy (an ice-type) ignores the others. Finally, it decides to accept Lillie as its trainer and gets caught in Lillie's Pokéball by itself. Lillie decides to spend some time alone with her newfound partner and takes a walk with Snowy. Team Rocket starts following

Ash and Professor Kukui notice that the Rockruff that lives with Professor Kukui is disappearing at night and returning the next morning badly injured. Following it, they find out that Rockruff is participating in a secret Pokémon training ground. Ash decides to help Rockruff train. Rockruff learns to use Rock Throw. After Rockruff defeats a Magmar that previously defeated it, Professor Kukui decides to leave Rockruff in Ash's care and Ash catches Rockruff.

While training on a beach, Lana's Popplio and Ash's Rowlet are caught inside one of Popplio's balloons, which is blown away by a strong wind. Rowlet bursts the balloon open, and they both crash into Team Rocket's secret base. Meowth and Mareanie chase after them, but they are rescued by Litten. While Ash, Lana, and Mallow search for the missing pair, Litten takes them to where it has been staying with the old Stoutland. Stoutland asks Litten to help them find their trainers; however, Team Rocket

Ash's Electrium Z-crystal is missing. Rotom, who is a big fan of an Alolan detective TV show, is prompted to try and find it with Pikachu as his assistant. In the meantime, Ash and the other students are all desperate to keep Kiawe, the only other Z-ring wearer, from finding out about the missing Z-crystal out of fear of his anger. However, the solution to the case may be even more surprising than anyone thinks. Rotom gets a new video camera function.

Mallow invites her classmates to her restaurant to taste her version of Alola's legendary stew; unfortunately, her use of Pikachu's electric shock to cook it doesn't go over so well. It turns out that she is missing an important ingredient: the rare Saffron honey, so Ash and Pikachu decide to help Mallow gather some honey. Their plan is to use an Oricorio to find it, but finding one is not so easy. Meanwhile, Ash's Rowlet seems to have developed feelings for Mallow's Bounsweet, but the feelings

Ash needs to begin training for a possible rematch against Tapu Koko. Sophocles helps out with scientific methods that yields surprising results. Naturally, this arouses Tapu Koko's interest. Tapu Koko challenges Ash and Pikachu with the whole Pokémon school looking on. Are Ash and Pikachu strong enough with the Electrium Z-Crystal power to withstand the Island Guardian's powerful attacks?

On the advice of a local shopkeeper, Ash and Pikachi (partly to escape being dragged along on the girls' shopping spree) kayak to nearby Treasure Island, where there are lots of wild Pokémon. After watching a group of Crabrawler, following an Cutiefly to a meadow full of friendly bug Pokémon and having fun with a group of Alolan Exeggutor, they are overrun by a school of Wimpod who try to steal their snacks. Preparing to return home, they find a Wimpod trapped inside a blocked cave. With the hel

Ash and Pikachu run into Litten again, but this time something's very wrong with its friend the old Stoutland. Ash carries Stoutland to the Pokémon Center, where Ash, Pikachu, and Rotom-Dex learn that Stoutland is dying. Litten and Stoutland escape from the Pokémon Center and return to the riverside, where Stoutland passes away in the night. After realizing what has happened, Litten is heart-broken and refuses to be comforted by anyone. After Litten finally comes to terms with the loss of its fr

While training Litten, who is having trouble mastering Fire Fang, Ash accidentally incurs the wrath of an unfriendly Sandygast when Rockruff's Rock Throw knocks the shovel off its head. Ash's attempt to temporarily replace it with Rotom-Dex only makes things worse. In a rage, Sandygast evolves into Palossand and swallows up Ash and also Litten when it tries to rescue him. With both Litten and Rotom-Dex affected by Palossand's energy drain, it is now up to the rest of Ash's classmates to save the

Ash and his classmates are excited to see DJ Leo, who is a popular local musician that plays music with his Alolan Dugtrio. After an Alolan Diglett that dances joins the group, the Dugtrio start quarreling among themselves as to which of them should take center stage. Amidst the threat of a split-up, Team Rocket steps in to steal Dugtrio.

When the Pokémon School announces a special Visitors Day, Ash's mother and Mr. Mime come for a visit. Delia charms everyone, including all of Ash's Alolan Pokémon. Meanwhile, Ash faces one of his toughest challenges ever... giving a report in front of his classmates, the school visitors and now his own mother! When the Team Skull grunts crash the festivities on Tauros and start causing mayhem, Delia insists on standing up to them. Can Ash and his Pokémon save the day?

When Team Rocket see Ash and Kiawe demonstrating Z-moves, they plot to find Z-crystals for themselves. While searching, Team Rocket run into Team Skull. Both gangs spot a Darkinium Z-crystal embedded in a large rock. Will they be able to work together to get through the infestation of Rattata and Raticate from earlier that are between them and the Z-crystal? If they can, how long will this alliance last? If they can't, who will get the Z-crystal first and will they be able to use it?