During the six months of Sun and Moon's disappearance into an Ultra Wormhole, Hau trained Popplio all across Alola so they could help defend the region from the Ultra Beasts. During their training, Popplio evolved into Brionne, and Hau obtained a Z-Ring and Primarium Z. After Necrozma entered Alola, Brionne is seen with Hau on Exeggutor Island, where Hau asked Hala to help him train further.
Later, while training with Hau in the Resolution Cave, Brionne battleed Hala's Bewear and defeated it with a Bubble Beam. Immediately after, Brionne evolved into Primarina. Hau credited its evolution to Hala's training, but the Island Kahuna told Hau it was due to how well he raised the Soloist Pokémon. Soon after, Hau and Hala witnessed Tapu Fini battling a Buzzwole. Hau and Primarina quickly jumped in to back up the Land Spirit Pokémon.
Personality and characteristics
Primarina is a very friendly and happy Pokémon, and is often seen smiling with its Trainer. It is able to trap opponents inside of its bubble balloons. Like its Trainer, Primarina has a strong desire to help others and has trained extensively to get stronger for that purpose. It has a close bond with Hau and is often seen at his side.