Chapter Summaries

Yan Yang discussed keeping his relationship with Entei private and learned how the League might handle Silvally. He agreed to let Professor Iku study Lycanroc and Armorouge, while concealing what he knew about Cosmog.

• Yan Yang told Professor Iku that his bond with Entei did not need to be deliberately hidden, but asked that people avoid disturbing his father.
• Iku said Silvally would likely be treated as Yan Yang's Pokémon and promised to support him if the Island King approached him.
• Yan Yang agreed to let Rotom Dex and Iku collect data on Lycanroc, asking them to wait to publish the discovery until Rockruff evolved.
• Yan Yang concealed what he knew about Cosmog, describing the little Pokémon only as a kind of Ultra Beast.
• Iku asked to study Armorouge's ability to intimidate Ultra Beasts, and Yan Yang agreed as long as the research was safe and finished within five days.

Yan Yang checked Pyroar and Armorouge’s information, discovering Armorouge’s new domain ability that prevented external factors from weakening him and his companions. Armorouge resolved to train harder and protect Yan Yang as Rotom finished analyzing Lycanroc’s data.

• Yan Yang checked his Pokémon’s status and found Houndoom had reached level 55 while Pyroar remained healthy at level 38.
• Yan Yang discovered that Armorouge’s domain prevented external factors from reducing the abilities of its dominant Pokémon and companions.
• Yan Yang told Armorouge about the change, and Armorouge resolved to protect him from anyone who might exploit his unusual ability.
• Armorouge decided to train harder so he could maintain his place as Yan Yang’s strongest partner after Entei.
• Rotom finished analyzing most of Lycanroc’s data, drawing Yan Yang’s attention.

After Lycanroc completed her examination, Tapu Koko appeared and told Yan Yang to go to Poni Island to meet the Sun and Moon Twin Gods, who wanted to see Cosmog. Yan Yang set out with six Pokémon, leaving Armorouge behind at the research institute, where Master Hu appeared holding Armorouge's Poké Ball.

• Lycanroc finished her examination, revealed a Rock and Ghost typing, and took Cosmog into her care.
• Tapu Koko arrived, told Yan Yang that the gods at the Sun Altar and Moon Altar wanted to see him, then quickly left.
• Yan Yang explained Cosmog's situation to his companions and chose which six Pokémon would travel with him.
• Armorouge volunteered to stay behind, and Yan Yang left for Poni Island riding Entei.
• Iku returned Armorouge to the research institute, and Master Hu appeared holding Armorouge's Poké Ball.

Yan Yang and Entei challenged the Overlord Kommo-o in Poni Canyon, and the battle became a test of Entei’s strength and Yan Yang’s command. Entei and Kommo-o were still fighting when the chapter ended.

• Yan Yang traveled to Poni Island and released his Pokémon in a secluded part of Poni Canyon.
• Entei led Yan Yang to a cave, where the Overlord Kommo-o prepared to defend its territory.
• Yan Yang scanned the Level 80 Kommo-o and challenged it to a battle alongside Entei.
• Entei trapped Kommo-o with Fire Spin, then charged it with Flare Blitz.
• Kommo-o used Clanging Scales, but Entei shielded Yan Yang from the noise and interrupted the attack with Extreme Speed and Body Slam.
• Kommo-o struck back with Dragon Claw, and Entei dodged as the battle continued.

Yan Yang and Entei fought the Overlord Kommo-o, then used a Z-Move to defeat it while keeping the cave intact. The battle ended with Yan Yang making a joke about Treecko.

• Cosmog cheered while Silvally studied the battle, and Pyroar and Houndoom shared Berries with several Skrelp.
• Entei revealed that he had suppressed his level to let Yan Yang enjoy the fight, then he and Yan Yang intensified their attacks against Kommo-o.
• Kommo-o used Hyper Voice, prompting Yan Yang to ask Entei to try a Z-Move; Entei agreed to control its power.
• Yan Yang activated the Fire Z, and Entei unleashed Inferno Overdrive, overwhelming Kommo-o and knocking it unconscious.
• Entei left the cave mostly unharmed, and Yan Yang celebrated with a joke about Treecko sounding like “time to clock out.”

Yan Yang defeated Overlord Kommo-o, received a Dragon Z-Crystal, and learned why Skrelp and Armorouge had left their clan. Kommo-o gave Yan Yang his exclusive Z-Crystal as a parting gift for Armorouge, and Yan Yang left with his Pokémon.

• Yan Yang treated Kommo-o after defeating him, and Kommo-o gave him a Dragon Z-Crystal.
• Yan Yang asked why Skrelp and Armorouge had left, and Kommo-o explained Skrelp had been neglected and bullied while Armorouge had been pressured to inherit his position.
• Kommo-o admitted he knew both Pokémon disliked him and accepted Yan Yang's promise to care for them.
• Kommo-o explained that Armorouge might need an opportunity to evolve, then gave Yan Yang his exclusive Z-Crystal for Armorouge.
• Entei reminded Yan Yang it was time to leave, and Yan Yang headed toward the altar with his Pokémon.

Yan Yang met the four island guardians at the altars, where they discussed Cosmog’s unstable energy and awaited Solgaleo and Lunala. The Legendary Pokémon arrived through Ultra Wormholes, and Cosmog happily flew to Solgaleo as Yan Yang greeted them.

• Yan Yang reached the Sun and Moon Altars with Entei and greeted Tapu Koko, Tapu Lele, Tapu Bulu, and Tapu Fini.
• Tapu Lele tried to test Yan Yang with Psychic Power, but Entei stepped in to protect him and she stopped.
• Yan Yang asked Tapu Fini about Solgaleo and Lunala, while Cosmog explored the altar and recalled that its parents had brought it there.
• Yan Yang explained Cosmog’s recent overuse of its strength, and the Tapus realized its two opposing energies might have become unbalanced.
• Entei and the Tapus sensed energy gathering above the altars, and Solgaleo and Lunala arrived through Ultra Wormholes.
• Lunala spoke to Yan Yang, and Cosmog flew onto Solgaleo’s head.

Yan Yang learned that Cosmog’s unstable sun and moon energies might be mastered through training, while Solgaleo and Lunala warned that Ultra Wormholes would soon threaten Alola. He agreed to help stop the crisis and was entrusted with Cosmog, though the large-scale danger was delayed for three years.

• Lunala explained that Cosmog’s exhaustion had made him sleepy and that his conflicting energies had left him unstable, but the recent effort might help him grow.
• Solgaleo told Yan Yang that human actions had disrupted the balance between worlds and would cause Ultra Wormholes to appear more often.
• Solgaleo and Lunala asked Yan Yang to help Alola, and he agreed despite Silvally’s concern and Entei’s support.
• Solgaleo and Lunala said they had delayed the crisis so that large-scale Ultra Wormhole appearances would not occur for three years, and the Tapu family recognized Yan Yang’s importance.
• Yan Yang asked to care for Cosmog, and Solgaleo and Lunala agreed to entrust him with the sleeping Pokémon.

The island guardians blessed Yan Yang with the power of nature, sharpening his senses and letting him use Z-Moves beyond Alola. After Yan Yang left with his companions, Entei went to meet Solgaleo and Lunala, who discussed whether Yan Yang could solve Cosmog’s problem.

• The four island guardians performed a ritual and infused Yan Yang’s Z-Ring and body with their blessings.
• Tapu Lele explained that Yan Yang could draw on nature to recover, while Tapu Bulu said he could use Z-Moves more effectively and in places with natural energy.
• The guardians sensed a trace of Fire-type power within Yan Yang, which they believed Entei had given him.
• Entei told Yan Yang to wait in Kommo-o’s cave, then headed after the island guardians as Yan Yang and the others departed.
• In Ultra Space, Solgaleo and Lunala discussed leaving Cosmog with Yan Yang and wondered whether he could resolve Cosmog’s problem.

Yan Yang and his Pokémon rested near Kommo-o’s cave while Lycanroc took Cosmog outside and struggled with guilt over his lost power. After meeting wild Lycanroc, she let go of her self-blame and reunited with Cosmog.

• The Totem Kommo-o prepared a place for Yan Yang and his companions to rest, and Entei returned after sparring with Tapu Koko.
• Lycanroc carried Cosmog away from camp and howled under the moon, drawing several wild Lycanroc to her.
• Lycanroc told the wild Lycanroc how guilty she felt about Cosmog losing his power, and one of them reassured her that his weakness was temporary.
• A wild Lycanroc snatched Cosmog and ran, prompting Lycanroc to chase after them and release much of her frustration.
• The wild Lycanroc tossed Cosmog back to Lycanroc, and she caught him, felt her guilt lift, and thanked the departing pack.

Yan Yang woke in Poni Canyon, where Entei gave him three Z-Crystals he had received from the island guardians after punishing Tapu Koko. After Yan Yang comforted Pyroar and reunited with Umbreon on the way out, he wondered who Umbreon's trainer was.

• Entei recalled how he had beaten Tapu Koko after learning it had endangered Yan Yang, then accepted three Z-Crystals from the island guardians to settle the matter.
• Entei gave Yan Yang Grassium Z, Psychium Z, and Waterium Z, while Lycanroc returned with Cosmog after spending the night outside.
• Pyroar complained that Lycanroc had taken his place as Yan Yang's favorite, and Yan Yang cheered him up by calling him the first Pokémon he had named.
• Yan Yang and his Pokémon left Poni Canyon, and Entei returned to his Poké Ball as they reached a more populated area.
• Yan Yang encountered Umbreon, who said it was in a hurry to carry something for its trainer, then continued on wondering who the trainer was.

Yan Yang returned to Iku’s residence and reunited with Armorouge while their Pokémon settled into the research institute. He privately told Iku that Ultra Wormholes would become frequent in three years, leaving the professor alarmed but committed to keeping the warning and Yan Yang’s identity confidential.

• Yan Yang let his Pokémon out at Iku’s residence, where Lycanroc took Cosmog to play, Silvally kept to himself, and Pyroar prepared to spar with Houndoom.
• Yan Yang entered the laboratory with Entei and reunited with Armorouge, who was relieved to see him and hoped to test himself against Entei someday.
• Yan Yang assured Armorouge that Skrelp was enjoying herself in the ecological area and told Armorouge he did not need to watch over him constantly.
• Yan Yang privately told Iku that he had met two people and the four island guardians, who had warned that Ultra Wormholes would occur frequently three years later.
• Iku reacted gravely to the news, and Yan Yang asked him not to reveal his involvement; Iku agreed to keep the information private.

Yan Yang learned that the Alola League intended to recruit him rather than threaten him, then Master Hu suddenly whisked him and Armorouge away. Meanwhile, Umbreon returned home to his trainer, Guzma, and told him about meeting Gastly.

• Iku told Yan Yang that Guzma would question him on the League's behalf, and Yan Yang learned the League hoped to recruit him.
• Yan Yang and Armorouge wondered where Master Hu had gone before Master Hu appeared and spoke secretly with Entei.
• Master Hu grabbed Yan Yang, and Armorouge seized his other arm; all three vanished together.
• Umbreon returned home with the requested items and greeted his trainer, Guzma.
• Umbreon recalled meeting Gastly, whose name reminded him of his own.

Dia agreed to join the League’s Ultra Guard to protect Alola from possible Ultra Beast attacks, while reflecting on the League’s response to the Aether Foundation scandal. He remembered a mysterious yellow Pokémon he had once helped during a typhoon, leaving its identity unresolved.

• Umbreon told Dia about meeting a kind person it had trusted, and Dia said he might like to meet them if they crossed paths.
• Dia accepted the League’s invitation to join the Ultra Guard, though he said he needed time to prepare.
• Dia recalled the Aether Foundation’s ties to the Dark Hunters and the League’s plans to gather Trainers and prepare defenses against possible Ultra Beasts.
• Dia vowed to remain at his post to protect Alola, and Umbreon comforted him as he considered the island guardian deities.
• Dia remembered helping a mysterious yellow Pokémon rescue Pokémon during a typhoon, and recalled that it had left without showing gratitude.

Master Hu removed the Poké Ball limit for Yan Yang and entrusted him with a Premier Ball that could summon him in an emergency. Yan Yang then agreed to explore Armorouge’s territory, and Armorouge carried him into the sky, promising to keep him safe.

• Master Hu used Psychic Power to block a Poké Ball’s sensing teleportation system, allowing Yan Yang to carry more than six Pokémon.
• Master Hu gave Yan Yang his Premier Ball, explaining that it would summon him if Yan Yang opened it during an emergency.
• Armorouge invited Yan Yang to visit his territory, and Yan Yang agreed after deciding the Pokémon at the research institute would not worry.
• Armorouge carried Yan Yang into the air, and Yan Yang overcame his fear of flying after Armorouge promised to protect him.

Yan Yang flew with Armorouge to explore Armorouge’s small but resource-rich territory. Armorouge stopped himself from expanding it after Yan Yang reminded him they would soon return to Johto, then proudly showed Yan Yang around.

• Armorouge carried Yan Yang through the air, and Yan Yang watched Pokémon hunting, resting, and fleeing below.
• After an hour, Yan Yang and Armorouge arrived at Armorouge’s territory, where Armorouge considered taking land from neighboring territories.
• Yan Yang grabbed Armorouge’s arm and persuaded him not to expand the territory before their return to Johto.
• Armorouge insisted his small territory did not reflect his strength, and Yan Yang praised him until he was satisfied.
• Armorouge led Yan Yang through the lush territory, which had forests, wildflowers, mountains, and a stream.
• Yan Yang admired the territory, while Armorouge decided he cared more about wherever Yan Yang would live than about keeping this land.

Yan Yang listened as Armorouge explained how poachers had captured him and nearly killed Skrelp, prompting him to escape and kill them. Yan Yang and Armorouge then unleashed a powerful Dragon Z-Move together, and the chapter ended with Armorouge asking whether Yan Yang would ever leave with him.

• Yan Yang told Armorouge about meeting Kommo-o and gave him the two Z-Crystals, while Armorouge explained why he had left his clan.
• Armorouge recounted how poachers had captured him, abused Skrelp, and been killed by him after he escaped.
• Armorouge admitted he had feared Yan Yang would reject him for killing the poachers, and Yan Yang reassured him.
• Yan Yang and Armorouge used Dragon Z to unleash Ultimate Dragon Tremor, devastating the surrounding ground.
• Armorouge asked whether Yan Yang would go away with him, and Yan Yang agreed only if they explained their departure to the other Pokémon and returned soon.

Missing the Spring Festival from his original world, Yan Yang unknowingly inspired Entei and the other Pokémon to prepare a celebration for him. Entei took Yan Yang out for the day while the others decorated their cave and gathered food, leaving the preparations underway.

• Yan Yang told Entei that he missed the Spring Festival, and Entei asked Master Hu to learn about it and help prepare a celebration.
• Master Hu explored Yan Yang's memories of the holiday and resolved to recreate its decorations and festivities.
• Entei gathered the Pokémon, who agreed to help make the celebration happen for Yan Yang.
• The next morning, Entei carried Yan Yang into the forest to play while the others cleaned and decorated the cave.
• Master Hu brought lanterns, couplets, and other supplies, and the Pokémon divided up tasks, including gathering Berries, fish, stones, and flowers.

Yan Yang celebrated his first New Year’s Eve in the Pokémon world with Entei and the others, sharing a festive meal and watching fireworks. As the group went to sleep, a resentful ghostly figure sensed the person he was seeking but chose to stay the night.

• Entei brought Yan Yang to a cave he and the others had decorated with lanterns, couplets, and a New Year’s feast.
• Pyroar performed a clumsy lion dance for Yan Yang, who praised him before joining everyone for dinner.
• At Entei and the others’ urging, Yan Yang took a small bite of fish, then ate Berries to clear the taste.
• Yan Yang wrote New Year’s couplets, and Master Hu set off fireworks while the Pokémon exchanged blessings with him.
• Yan Yang thanked his companions and wished readers a happy Spring Festival before everyone prepared to sleep.
• A resentful ghostly figure sensed the person he was seeking nearby, but the festive atmosphere stopped him from acting, so he stayed for the night.

Yan Yang met with Guzma, who relayed the Alola League’s offer to register him, but Iku rejected it because Yan Yang’s home was in Johto. Iku then warned Guzma that Ultra Wormholes would multiply drastically in three years, leaving the League alarmed and scrambling to prepare.

• Armorouge returned Yan Yang to the research institute, then took Pyroar away to spar while Lycanroc and Houndoom stayed with Yan Yang.
• Guzma arrived the next morning and met Yan Yang and Iku, with Entei keeping watch nearby.
• Guzma explained that the Alola League wanted Yan Yang to register in Alola, but Iku refused and said Yan Yang would return to his home in Johto.
• Iku warned Guzma that Ultra Wormholes would begin appearing in great numbers in three years, and Guzma realized the League’s preparations might not be ready in time.
• Iku said he was investigating a Pokémon capable of suppressing Ultra Beasts, and Guzma left after reassuring Yan Yang and asking him to visit before going home.