Chapter Summaries

Black Yi Ryuusei revealed Naganadel as an Ultra Beast and offered Cynthia the chance to join him, but she rejected his expectations. Meanwhile, Yong’s Swampert overpowered Volcanion with Counter, leaving Yong and Metagross ready to press their attack.

• Black Yi Ryuusei introduced Naganadel as a Poison- and Dragon-type Ultra Beast from the Other World and urged Cynthia to join him.
• Cynthia responded that it was a shame, refusing Black Yi Ryuusei’s offer.
• Swampert activated its Primal Markings and unleashed its force domain power and Nature Power to withstand Volcanion’s Heat Crash.
• Yong ordered Swampert to use Counter, and Swampert hurled Volcanion into the ground.
• Yong ordered Swampert to use Hammer Arm and Metagross to use Great Sumeru Hammer.

Lysandre’s Volcanion overwhelmed Yong’s Swampert and Metagross with Volcanic Eruption, transforming the clearing into a blazing volcanic field. Yong remained protected by Rock Solid as he faced Volcanion’s full strength.

• Swampert combined Hammer Arm with the Great Sumeru Hammer and smashed the ground, but Lysandre ordered Volcanion to use Volcanic Eruption.
• Yong warned Swampert to retreat as Volcanion erupted from the earth in a pillar of flame and launched steam bombs at Swampert and Metagross.
• Swampert used Hydro Pump to shift away from the attack, but a surge of flame swallowed it.
• Volcanion’s steam bomb pierced Metagross’s Psychic defense, burned its metal body, and knocked it down, causing the Psychic Field to collapse.
• Volcanion filled the clearing with lava, fire, and suffocating steam while Rock Solid protected Yong, who calmly faced the unleashed Pokémon.

Yong and Lysandre’s battle continued as Swampert endured Volcanion’s attack and recovered with the aid of Kyogre’s power. Meanwhile, the battle’s heat and energy stirred the Poison Black Yi Family’s underground testing ground, and Yong began the Bond Phenomenon with Swampert.

• The battle’s energy and heat seeped through underground fissures, causing the poisonous creatures in the Poison Black Yi Family’s testing ground to grow restless.
• Lysandre recognized Swampert’s resistance to Fire- and Water-type attacks, while Swampert survived Volcanion’s Eruption and began recovering.
• Metagross rose beside Swampert to guard it as Yong prepared to fight Volcanion with everything he had.
• Yong told Metagross to control the field and urged Swampert to answer his feelings.
• Swampert’s markings shone with rainbow light as it raised its arms, and Yong initiated the Bond Phenomenon.

Cynthia and the Pokémon League faced Team Plasma and the Black Yi House on the coast as Naganadel challenged Garchomp. When the enemy launched a coordinated assault, Cynthia revealed that Garchomp had recently broken through and ordered it to charge straight through their attacks.

• Naganadel appeared on the beach, and Garchomp roared at the Ultra Beast as their auras pressed against each other.
• Cynthia confronted Team Plasma and rejected Bronius's offer to ally with the Black Yi House.
• Ishijima learned from Guangzhi that communications with League Headquarters were established and that they were waiting for the right moment to send a message.
• Black Yi Ryuusei ordered Naganadel to use Dragon Dance and Dragon Pulse while Bronius's allies sent Amoonguss, Toxicroak, and Scolipede to attack Garchomp together.
• Cynthia ordered Garchomp to charge through the coordinated attacks with Dragon Claw and revealed that it had recently broken through.

Cynthia’s Garchomp battled Black Yi Ryuusei’s Naganadel, overpowering its deadly venom with its newly awakened Dragon and Fighting powers. The clash ended with Garchomp restraining Naganadel, leaving Team Plasma’s operation in jeopardy.

• Garchomp charged through the opponents’ attacks and broke past their defenses as Black Yi Ryuusei ordered Naganadel to use Poison Jab.
• Cynthia had Garchomp unleash Dragon Rush, revealing the Dragon and Fighting Origin Extremity powers it had gained after its breakthrough.
• Naganadel met Garchomp’s attack with crystalline venom that corroded their energy fields and distorted the space around them.
• After the energy clash subsided, Garchomp circled overhead with its tail around Naganadel’s neck, while its crimson energy devoured the venom.
• Bronius and his companions turned pale, Black Yi Ryuusei’s expression darkened, and Guangzhi and Ishijima praised Cynthia’s victory.

Cynthia and Garchomp faced a sudden ambush by a huge Ghost-type Pokémon emerging from Naganadel’s shadow, while Black Yi Ryuusei and his allies attacked. Cynthia identified the figure as the spirit of his dead Gengar and ordered Garchomp to counter with Crimson Dragon Slash.

• Garchomp restrained Naganadel with its tail and injured it with Rough Skin as Cynthia challenged Black Yi Ryuusei and his allies.
• Black Yi Ryuusei revealed a shadowy Ghost-type Pokémon, which grew by absorbing Poison-type energy from the surrounding Pokémon and the ground.
• Cynthia ordered Garchomp to throw Naganadel away and strike the shadow with Shadow Claw, but the attack passed through it.
• The shadow enveloped Garchomp, and Black Yi Ryuusei commanded it to use Ice Punch as Bronius and the others launched a combined attack.
• Cynthia identified the Ghost-type Pokémon as the spirit of Black Yi Ryuusei’s dead Gengar and ordered Garchomp to use Crimson Dragon Slash.

Black Yi Ryuusei’s Gengar Spirit was exposed and defeated by Garchomp, unleashing dangerous clouds of negative emotions across the beach. As Cynthia and Garchomp held back the effects, Black Yi Ryuusei approached the collapsing Gengar and questioned its weakness.

• Black Yi Ryuusei’s past revealed how he raised Gastly into a Gengar that fed on the spirits and negative emotions of Pokémon, then used the Black Yi House Clan to expand his criminal operations.
• Garchomp endured Gengar Spirit’s assault, broke through its black curtain, and revealed the towering spirit to Ishijima and Guangzhi.
• Ishijima and Guangzhi recorded the scene and sent it to authorities, while Garchomp shattered Gengar Spirit with a powerful Fusion Technique Skill.
• Gengar Spirit collapsed and released toxic mists that withered Amoonguss, drove Toxicroak into a frenzy, and corroded Scolipede; Bronius and his companions lost consciousness.
• Garchomp shielded Cynthia from the spreading mist, while Black Yi Ryuusei approached Gengar Spirit and said its power should not have been like this.

Yong and Lysandre’s battle continued as Swampert used the Bond Phenomenon and Primal Reversion to confront Volcanion. Yong used Surf to obscure the battlefield and disappeared from view, setting up a Mega Punch against Volcanion.

• Lysandre said he did not know what Black Yi Ryuusei was doing and urged Yong to focus on their battle.
• Lysandre ordered Volcanion to attack with Steam Eruption, and Yong told Swampert to use Surf against the ground.
• Swampert raised a towering wave that evaporated into dense steam, concealing the battlefield.
• Volcanion’s attack blasted through the water, but Swampert was nowhere to be seen afterward.
• Yong revealed he had anticipated Volcanion’s Water Absorb and ordered Swampert to use Mega Punch.

Yong and Swampert overwhelmed Volcanion with a powered-up Rock Storm that raised a lava-filled mountain resembling Precipice Blade. As the battle ended, Lysandre wondered about Swampert’s Bond Phenomenon and mysterious markings, unaware that another upheaval was approaching.

• Swampert dug beneath Volcanion and endured the scorching heat to land an Aura-boosted Mega Punch.
• Yong ordered Swampert to use Rock Storm, and its combined powers raised a massive, lava-covered mountain that trapped Volcanion.
• Swampert punched the mountain apart, unleashing a devastating rain of molten rock and ending the battle.
• Lysandre recognized the Bond Phenomenon but questioned the meaning of Swampert’s markings and fleeting silhouettes.
• An unknown upheaval approached, unnoticed by Yong and Lysandre.

Cynthia and the League subdued the Black Yi House Clan’s forces, but Black Yi Ryuusei merged with Gengar and unleashed a huge toxic shroud. The shroud burrowed underground near Yong, triggering violent tremors across the island.

• Cynthia ordered Ishijima to report the incident, arrest the Black Yi House Clan and Team Plasma members, and recover the rampaging Pokémon for treatment.
• Black Yi Ryuusei declared that his plan had not failed and urged Gengar to eat him so they could gain ultimate power.
• Gengar enveloped Black Yi Ryuusei in its shroud and formed a vast tornado of poisonous gas that rose into the sky.
• Cynthia pursued the shroud with Garchomp and found that its power dissolved her Dragon Pulse before it compressed and raced toward the highland ruins where Yong was.
• The shroud struck the ruins, burrowed underground, and set off violent tremors that shook the island beneath Yong, Lysandre, and Cynthia.

Fakola Island began collapsing as underground poisonous gas and marsh gas detonated, unleashing deadly mire, fires, fissures, and flooding. Yong stayed behind to contain the spreading mire while Cynthia and Lysandre flew to the coast to rescue the survivors.

• Violent tremors and poisonous fumes struck Fakola Island, and Ishijima and Guangzhi organized League Trainers to protect the crowd with Flying-type and Psychic-type Pokémon.
• An underground explosion shattered the highlands and sent poisonous mire, flames, and shock waves across the island.
• Yong and Cynthia halted their battle with Lysandre, who agreed to rescue people and Pokémon along the coast.
• Yong sent Cynthia with Lysandre to evacuate survivors, then descended toward the island with Metagross to hold back the poisonous mire.
• Seawater surged through the island’s widening fissures as the coast’s limited number of Flying-type and Psychic-type Pokémon struggled to protect everyone.

As Fakola Island collapsed under the earthquake and tsunami, Yong had Swampert and Metagross try to slow the spreading fissures and poison swamp so the tourists and Pokémon could evacuate. Swampert’s Primal Reversion deepened its connection to the earth, and Yong began Mega Evolution with Metagross.

• Yong landed with Metagross between the coastal crowd and the island’s highlands, then summoned Swampert to help halt the destruction.
• Swampert used Earth Power and entered Primal Reversion, drawing on Nature Power as its connection to the earth grew stronger.
• Swampert spread Earth Power through the ground, stopping a fissure and beginning to repair it.
• Yong asked Metagross to help control the spreading poison swamp and mist, then activated his Key Stone to begin Mega Evolution.

Yong and his Pokémon fought to contain the collapsing island, poison swamps, and flooding seas. Roserade and the other Pokémon joined them, helping stabilize the land as Milotic and Lysandre's Gyarados defended the shores.

• Yong pushed Mega Metagross and Primal Reversion Swampert to use Confusion and Earth Power, slowing the poison swamps and fissures but failing to stop the island's collapse.
• A section of the island broke away, seawater flooded in, and Yong struggled to stay focused as the disaster worsened.
• Roserade arrived with Grassy Terrain and its flower-burial aura, strengthening Swampert's control and helping repair the land.
• Vigoroth, Breloom, Treecko, and other Pokémon joined Yong to freeze poison, fill fissures, and block the spreading swamps.
• Yong called out Gliscor, Bronzor, Kleavor, and Gigalith, and their combined efforts saved the stretch of land from imminent collapse.
• Milotic led Water-type Pokémon against the waves along the shore, while Lysandre's red Shiny Gyarados defended another stretch of coast.

As Fakola Island collapsed and poisonous rain fell from the erupting Poison Swamp, Yong and the others struggled to protect themselves while Cynthia and Professor Lysandre tried to keep the evacuees safe. Just as Yong lost consciousness, a mysterious Pokémon’s familiar voice and a red-gold light appeared, followed by a surge of renewed strength.

• The explosion beneath Fakola Island intensified, and Cynthia and Professor Lysandre evacuated people to a small fragment of land while the Pokémon held back the waves.
• Cynthia asked Ishijima whether the Pokémon League had replied, and Guangzhi said its rescue team was still too far away to arrive soon.
• The Poison Swamp erupted through the island’s center, and Yong ordered his Pokémon to build and reinforce a rock barrier against the corrosive rain.
• The rain corroded the barrier as the island crumbled, leaving Yong exhausted and convinced they might not survive.
• A familiar Pokémon voice and a red-gold light appeared before Yong, Swampert roared with renewed vigor, and Yong received a reassuring message before losing consciousness.

Cynthia and the others fought to keep the raging sea from overwhelming them until an unseen ally calmed the waters and gathered Fakola Island’s poison into a sealed sphere. The island and sea settled, and a small white figure inside a pink psychic shield disappeared, leaving Cynthia relieved that the crisis was over.

• Milotic, Gyarados, Volcanion, and the other Pokémon combined their powers to counter the towering waves threatening the shore.
• Cynthia watched pink energy redirect the surging water back into the sea, preventing it from sweeping over the group.
• A column of poison gas rose from the island as acid rain began falling, and Cynthia prepared to hurry toward its center.
• A tiny white figure appeared inside a pink psychic shield and used immense Psychic-type power to gather the poison swamps and clouds into a black sphere.
• The pink light vanished as the earth, sky, and sea grew calm, and Cynthia realized the crisis was over.

Yong awoke in a hospital after sleeping for three days, having survived poisonous gas mixed with a Pokémon’s resentment. As he recovered, he learned the Kalos League was investigating the incident, and he began thinking about changing the balance of power among the Seventeen Families.

• Yong encountered Mew in a strange void, but Mew transformed into a resentful black shadow that plunged into his head and caused him agonizing pain.
• Yong woke in a hospital room surrounded by Cynthia, Olivia, Lana, Kiawe, Maeda, Menehune, Nurse Joy, Chansey, and Mismagius.
• Nurse Joy explained that Yong had inhaled poisonous gas mixed with Pokémon resentment and ordered him to rest after he tried to sit up.
• Cynthia introduced Maeda, a Kalos League Investigation Team captain, and Menehune, an Akala Island professor and captain candidate.
• Maeda promised the Kalos League would provide an explanation, and Yong told him that he and Cynthia stood with Diantha and Professor Sycamore.
• After Maeda left, Yong thought of Black Yi Ryuusei and resolved that the balance of power among the Seventeen Families would change.

After the poison swamp erupted on Fakola Island, the regional Leagues coordinated a response and cracked down on the Black Yi House Clan and its allies. Mew saved the island’s survivors, and Yong finally woke after the crisis had passed.

• Steel Armor reported the attack on Yong and Cynthia to Diantha, who ordered him to Fakola Island and designated Kalos’s western waters as free port and international waters.
• The Unova League made a similar designation, while investigators from Hoenn, Sinnoh, Kalos, and Unova mobilized and the Dark Forces suspended their operations.
• Caitlin defeated Ghetsis when he tried to intercept her crackdown on Team Plasma, and Diantha surrounded the Poison Island with investigators.
• Mew used psychic power and the World Tree’s authority to stop Fakola Island from breaking apart and transferred the survivors to safety.
• League forces seized the Black Yi House Clan’s assets, arrested its patriarch, and weakened allied families; Steel Armor escorted the tourists and Trainers back to Kalos.
• Yong woke after sleeping through his recovery, while Cynthia remained asleep under Garchomp’s protection.

While recovering in an Alola hospital, Shiyan Yong and Cynthia discussed the Pokémon League’s gains after the recent conflict and welcomed Olivia’s hospitality. Yong declined Menehune’s invitation to enroll at the Pokémon School but offered to recommend students, leaving Cynthia curious about the school.

• Cynthia told Shiyan Yong that the Pokémon League had moved quickly after the conflict, while Diantha had shared benefits and Alola had received resources.
• Olivia welcomed Shiyan Yong and Cynthia to Alola, and Lana congratulated Yong on becoming Hoenn League Champion while Kiawe vowed to surpass him.
• Menehune invited Yong to enroll at the Pokémon School, but Yong declined and offered to introduce potential students instead.
• Yong planned to suggest that Reggie, Qingcao, and Kofu attend the school, and Menehune hurried off happily to tell Professor Kukui.
• Cynthia expressed interest in the Pokémon School, and Olivia welcomed her and Yong to the Alola Islands before leaving them to rest.

After recovering in the hospital, Yong learned that Mew may have helped save Fakola Island and wondered whether Swampert’s strange, prolonged sleep had a deeper cause. He then explored Akala Island with Cynthia, Kiawe, and Lana, taking in its scenery and culture.

• Cynthia gave Yong the Pokémon Balls of his recovered Pokémon, and he confirmed they were safe.
• Cynthia described sensing a pink light and powerful Psychic Power during the upheaval, and Yong said he had once traveled with Mew.
• Cynthia told Yong that Swampert had slept for two days after protecting him, and Yong recalled a red flash and Swampert’s roar as he considered what might have happened.
• Cynthia explained that some rescued Pokémon had been sent to a Kalos nature preserve while Mr. Steel Armor took in those still able to fight.
• Yong and Cynthia walked along Akala Island’s coast with Kiawe and Lana, learning about the island and its trial sites.
• Yong remarked that Akala lived up to its reputation as the island of passion.

Yong and Cynthia explored Akala Island’s beach and learned about Ultra Beasts and Alolan regional forms. After Cynthia became interested in Alolan Vulpix, Yong agreed to visit Mount Lanakila with her, leaving their next destination set for Ula'ula Island.

• Yong and Cynthia watched the beach activities while Lana explained that the Aether Foundation had identified some Ultra Beasts that could interact with humans, including Naganadel.
• Cynthia asked about other Ultra Beasts, and Kiawe and Lana described how the dangerous Guzzlord had devoured nearly half a city before being driven away.
• Yong spotted an Alolan Marowak, and Kiawe and Lana explained how Alolan Pokémon developed different appearances and types to adapt to local environments.
• Lana told Cynthia that Alolan Vulpix lived on Mount Lanakila, and Yong agreed to visit the mountain with her.