In a carpark, Kagetora and Ilima are in the midst of a battle between their Eevees. Kagetora’s Eevee uses Take Down, though Ilima’s Eevee dodges and responds with Swift. The attack is a direct hit and Kagetora recalls his now fainted Pokémon. Kagetora compliments Ilima, and gifts him an Eevium-Z.
Meanwhile Ash and friends are at the Pokémon School practicing their moves. Professor Kukui referees the match between Ash and Torracat and Kiawe and his Turtonator. Torracat runs towards Turtonator with a Flame Charge, though the foe responds with a defensive Dragon Tail. Kukui calls for the battle to end, and the two trainers praise their Pokémon’s efforts. The other students walk to Ash’s side and comment on Torracat’s acquired strength since it evolved. Mallow wonders which Pokémon will evolve next. Sophocles settles his bouncing Togedemaru and states it cannot evolve. Sophocles' attention turns to Ash, and he queries why Pikachu hasn’t evolved yet. Ash replies that Pikachu is fine as he is, and they have made that decision.
Girls screams turns the student’s attention to Ilima’s unexpected arrival. He runs over to Professor Kukui, whom queries his surprise visit. Ilima replies that he arrived in the morning to attend to a few things. Mallow addresses Ash’s curiosity, stating Ilima is a school graduate. The bells rings and Kukui dismisses the class. The students are now sitting behind their desks, informing Lillie and Ash about the ‘legends’ of Ilima. They refer to Ilima as ‘special’ and a ‘Prince’ as he is considered the best students in the school’s history. Ilima skipped multiple grades before flying to the Kalos region for further study. He also has a school based fan club, rumours say he responsible for half of Principal Oak’s office trophies and that he could make Komala’s eyes open. The last rumour causes the student and Rotom Pokédex to speculate about Komala’s eyes. Meanwhile Ilima is sitting in the principal’s office with Samson Oak and Professor Kukui. Samson sampled Ilima’s souvernir, some Lumiose Galettes. Ilima describes his Kalos experience as stimulating, with many strong trainers. Kukui announces his plans to establish a Pokemon League in the Alola region. He invites Ilima to attend the Pokemon League, when completed, because of his experience. Ilima graciously accepts the offer. The conversation ends with a knock at the door. It turns out to be Ash and friends. The group request Ilima demonstrates his legendary reputation, he is startled by the forward nature. The group eagery escort Ilima to the belltower in the hope of seeing Komala’s eyes open. In anticipation, Rotom’s turns its camera on to record the ‘find of the century’. Komala’s ears twitch and its rolls immediately towards Ilima. Its face twitches when it hears Ilima’s voice before it returns to its resting place under the bell, much to everyone’s disappointment. However, Rotom persists only to be knocked away by Komala.
Unbeknown to the group, Zipp peers through a set of binoculars focussing in on Ilima and motorcycles away. Zipp meets up with Tupp and Rapp whom are talking amongst themselves in an alleyway. Zipp confirms the rumors regarding Ilima’s arrival. Tupp who accuses Ilima of stealing something from him, orders Zipp and Rapp to notify others about Ilima’s arrival.
Attention turns back to the school, and Ilima is suprprised by the out-of-control nature of the rumors. He officially confirms that Komala has always been sleeping, much to Rotom’s disappointment. Though Ilima is able to half confirm the legend about him jumping from the large tree. The class, now in swim wear, examine the large tree and nearby lake from the ground. Sophocles explains the concept of a PokéDive. The water sport involves a trainer and Pokémon jumping and diving together. Lana and Popplio take the first dive. Ash and Pikachu eagerly make their way to a taller jump point. The dive looks promising, though the two lose their form after colliding causing them to hit the water’s surface with painful consequences afterwards. Next, Kiawe and his Marowak wave to the crowd below before Kiawe makes a solo dive. And Marowak remains on the diving platform shaking because of a fear of water. The jumps progress onto more acrobatic moves, with Mallow and Sophocles also having a go. With everyone’s encouragement Ilima agrees to jump. Ilima performs a handstand on the highest diving board before falling into his somersaulting descent with Eevee. The exhibition and well synced display amazes the students. Sophocles comments that perhaps the dive would have been better if Eevee had evolved into a Vaporeon. Ilima responds that evolution is a way to increase a Pokemon’s power, but Eevee already possesses its own abilities. Ilima pulls out his Z-Ring from his back pocket, and the students run towards Ilima to get a better look. The Z-Crystal appears strange to the student, though Lillie states that it is an Eevium-Z Crystal, Ilima replies that it was one of the reasons for his visit. Ilima affirms he has no intention of evolving Eevee, and that the Z-Crystal will make it stronger. Ash agrees with Ilima’s statement, with striking similarities between their relationships with their Pokemon. Ash explains this is his central motivation for undertaking the Island Challenges of Alola. Ash, hoping to see Eevee’s power, challenges Ilima to a battle. Ilima gladly accepts the request.
Ilima's fans emerge and start cheering for their idol, in response Ash’s classmates decide to cheer him on. As the match is about to begin several Team Skull grunts ride into the school on their motorcycles. Ilima confronts Tupp, requesting the outsiders leave the school’s grounds. Tupp criticises Ilima for not evolving his plain Normal-type Eevee. Tupp brags about how his male Salandit is due to evolve any day now because of its battle experience. Ilima queries who Tupp is, much to his shock. Tupp clarifies, with a flashback to his time as a student that Ilima stole his luck with women. The trio of girls who were impressed with Tupp for already having a Pokemon, a Alolan Grimer are quickly distracted by Ilima and his Eevee’s cuteness. Tupp, dressed in new shades and jewellery, attempts to catch the girls attention is squandered by Ilima’s appearance. With the revelation, Ilima sincerely apologises. However Tupp replies that the apology is unacceptable and many of his fellow grunts share similar sentiments against good-looking guys like Ilima for ruining their luck with women. The grunts call out their Pokemon including a Spinarak, Golbat, Yungoos, Drowzee, Houndour, Ekans, Alolan Rattata, Scraggy and Alolan Raticate. Ilima tells Ash and friends to stay back, as the Team Skull grunts are angry with him. Ilima calls on his Eevee assistance and uses its Quick Attack t run through the horde of Team Skull Pokemon. Eevee performs Baby-Doll Eyes, causing both the grunts and their Pokemon to become immobilised with hearts in their eyes, followed by Swift attack. The attack hits its mark, leaving only Zipp, Tupp and Rapp standing. The remaining trio call upon their Pokemon, Zubat, Garbodor and Salandit. Eevee manages to dodge Garbodor’s Venoshock and Zubat’s Wing Attack, though is hit by Salandit’s Flame Burst. Ilima interrupts the trio’s early celebration, and Eevee jumps back up. Ilima explains that despite the plain nature of the Normal type, its one advantage is its few weaknesses. Ilima forms the Eevium-Z pose, calling upon Eevee’s friends for assistance. Eevee’s cry echoes across Melemele Island, with all of its evolutions running to its aid, and Vaporeon emerges from the school’s water in time. The Pokémon assemble, lending their elemental powers Eevee, who uses Extreme Evoboost to increase its stat abilities. All of the female Team Skull grunts are immobilised and dazzled by Eevee’s cute display. Before Tupp and Zipp can attack Eevee fires its Last Resort at them. The impact sends the Team Skull grunts flying across the sky, with the females bidding ‘Sir Ilima’ farewell. Ilima's fans cheer for him and Eevee’s evolved forms depart. Ilima tells Ash agree to have a match some other time. Sophocles now understands Ilima’s thoughts on unevolved Pokemon and strength.
Later, the group and Illima are served pancakes in a café by an Alolan Raichu. Everyone except Ilima have toppings on their pancake. Lana notes that for Ilima simplicity is best, to which he agrees.
