Pokémon

Go reunites with his Mugendina and chooses to leave it under Dande's care. Afterwards, Satoshi and Go revisit the place where Go had first met his Aceburn, leading them to reconnect with Aceburn's former friends. After a confrontation with Team Rocket, Go is summoned by Project Mew, forcing him to miss Satoshi's battle with Dande.

The battles from the Masters Eight Tournament semifinals and the teams for Satoshi and Dande are reviewed.

Go travels to Hoenn for his next assignment for Project Mew. Meanwhile, Satoshi and Dande begin their full battle in the Masters Eight Tournament Finals, with Satoshi being allowed to use Mega Evolution, Z-moves and Daimax. In the battle, Gangar takes down Dande's Intereon, but Gangar is later knocked out by the opposing Barrikohru.

Satoshi and Dande continue their battle, with Satoshi's Mega Lucario defeating Barrikohru. As the battle goes on, Dande's strategy begins to tease Satoshi. After Mega Lucario is knocked out by Drapult, Kairyu avenges its teammate by finishing off Drapult with a Draco Meteor, giving Satoshi a 3–2 lead. For his next Pokémon, Dande brings out his Gorirander.

After Dande's Drapult is defeated, Dande gains some momentum and begins to turn the tables. Satoshi's Kairyu is taken down by the opposing Gorirander, who is then knocked out by Uonoragon. However, Uonoragon is beaten by Dande's Aceburn moments later. With just one Pokémon remaining, Satoshi sends in Pikachu to go up against Lizardon. After each Pokémon uses their strongest attacks, the clash causes Mugendina to reawaken and interfere with the heated battle.

Satoshi and Dande have their Daimax Bands recharged by Mugendina, leading to a battle between Kyodaimax Aceburn and Kyodaimax Pikachu, which ends in Pikachu's favor. Pikachu then goes up against Dande's Lizardon and briefly passes out. However, Pikachu becomes motivated after imagining all of Satoshi's Pokémon cheering for him, allowing him to get back up and deliver one last Thunderbolt on Lizardon. Pikachu manages to defeat Lizardon, resulting in Satoshi's victory over Dande. Satoshi becomes the new World Champion.

The Project Mew team sets out for Faraway Island to commence their search for Mew. After being separated into two different groups, Shigeru and Tsurugi encounter a Groudon, while Go, Tokio, and Asahi come across a Kyogre.

The members of Project Mew are forced to confront Groudon and Kyogre. Mew reveals itself after disguising itself as the Hoenn Legendaries. Mew launches attacks at the Project Mew team until Go thanks it for inspiring him to set off on his journey. After the Project Mew team has achieved its goal, Go, Tokio, and Shigeru all go their separate ways.

Satoshi and Go return to Kanto and reveal their intentions on starting new adventures without each other. However, Go is unwilling to tell Satoshi his plan, as he doesn't want to betray his friendship with him. When Satoshi publicly announces his decision to continue his journey alone, Go becomes upset due to the feeling of betrayal. The dispute between the two friends is paused when Lugia suddenly appears, prompting Satoshi and Go to begin a raid battle with it.

Following their Raid Battle with Lugia, Satoshi and Go go their separate ways and embark on their new journeys.