HAPU POKEMON MOON TRIAL

Acerola forced Nanu to let Ash have a battle with him, which he begrudgingly accepted. Later, after realizing his kendama had gone missing, Nanu visited Acerola to retrieve it. Believing that Ash wasn't ready to challenge him, Nanu lied, claiming that he was a different person, and he had Ash play with his Alolan Meowth while he went somewhere else. He asked Nanu to tell him about the Pokémon the people of Alola call 'the Blinding One', but the call was interrupted by the arrival of Ash, who came to challenge Nanu in a grand trial. In Tough Guy Trials!, Nanu received a phone call from Giovanni, who was surprised to learn Nanu had become both a police officer and an island kahuna. Later, when Acerola‎‎ had been kidnapped by a Gengar nicknamed Greedy Rapooh and Team Rocket helped save her, Nanu reconsidered and gave them a Z-Power Ring, which they used in conjunction with their Darkinium Z to activate Black Hole Eclipse and defeat Rapooh. However, he initially refused to give one to them, even claiming that the island kahuna was away at the time. Nanu debuted in Why Not Give Me a Z-Ring Sometime?, where Team Rocket hoped to get a Z-Ring from him at the recommendation of Giovanni.

HAPU POKEMON MOON TRIAL

Pokémon Ultra Sun and Ultra Moon Grand trial battle At one point, he is also seen giving a beginning Trainer his starter Pokémon, with the choice being between three Alolan Meowth with different personalities. In these games, it is also revealed that, after the death of Hapu's grandfather, the previous kahuna of Poni Island, Nanu had been responsible for holding the grand trials on Poni before Hapu was elected as the new kahuna by Tapu Fini. In both games, he then gives the player the Purple Petal, the final flower petal of the trial.

In Ultra Moon, he challenges the player to a rematch, while in Ultra Sun, he is not in the mood for a battle due to having just been defeated by Hau. Later, he also appears in Acerola's place at the Aether House during Mina's trial. In Pokémon Ultra Sun and Ultra Moon, after Necrozma unleashes several Ultra Beasts around Alola, Nanu is briefly seen facing a Guzzlord at the Ruins of Abundance. After this mission, he and Looker discovered Anabel on the shores of Poni Island. Ten years prior to the events of Pokémon Sun and Moon, he participated in a three-person mission with Looker and an unnamed Faller to track down a Guzzlord, which ultimately cost the Faller her life. During his time with them, he is described as having been an elite officer, on par with Looker. He is also revealed to be a former member of the International Police and Looker's former superior.

In Pokémon Sun and Moon, Nanu later provides information on sightings of the Ultra Beasts around Ula'ula. As such, Acerola joins the Elite Four in his place. He turns down the offer, however, stating that he has no obligation to join, unlike when the guardian deity chose him to become the kahuna. When Professor Kukui forms the Alola Pokémon League, he offers Nanu a position in the Alola Elite Four. Upon defeat, he grants the player the Darkinium Z and wishes them well as they, along with Gladion and Hau, head to Aether Paradise to rescue Lillie.

After Team Skull is defeated by the player, he reveals that he is the kahuna of Ula'ula Island and challenges the player in Malie City for their island challenge grand trial. Nanu is a police officer who first shows up to aid the player in getting into Po Town. Pokémon Brilliant Diamond and Shining Pearl.

Hapu pokemon moon