Pokémon Ultra Sun and Ultra Moon - Plumeria, Kahuna Olivia's Grand Trial for Rockium Z

Plumeria and Kahuna Olivia's Grand Trial for Rockium Z are the final challenges you'll face on the Akala Island section of your Alolan Island Challenge.

Here on this page we'll explain all you need to know about the story and main events as they unfold here, and as with all pages of our walkthrough we'll highlight any and all trainers, items and wild Pokémon available to catch as well.

For more general guides and other walkthrough pages like this meanwhile, head back to our main Pokémon Ultra Sun and Ultra Moon walkthrough and guide hub.

Pokémon Ultra Sun and Ultra Moon - Plumeria

Plumeria isn't too tricky to beat - she only has two Pokémon, both weak to Psychic and Rock-type attacks - but she's noteworthy in that this is the first time you'll face and Admin from Team Skull.

She'll approach you as you exit Akala Outskirts to the north into the Ruins of Life, and with both of her Pokémon being Poison-type they can be a pain if you don't plan for it, so just make sure you save ahead of the battle and swap those Grass and Fairy-type Pokémon to the back of your roster!

After the battle, Professor Burnet and Lillie will show up and take care of your Pokémon, then it's on to the Grant Trial itself.

For more on Pokémon Ultra Sun and Moon, head to our main Pokémon Ultra Sun and Ultra Moon walkthrough and guide hub, which includes guides to new Ultra Sun and Ultra Moon Pokémon and Pokédex changes, the Festival Plaza, a list of Global Missions and rewards, an explainer on Pokémon Bank, a dedicated page on Pokémon Competitive Training, including IV Training, EVs and hidden stats, Breeding 6IV Pokémon explained and how to farm Bottle Caps fast for Hyper Training. What's more, we have pages on the Rockruff event for getting Dusk Form Lycanroc and, last but not least, a full Ultra Sun and Ultra Moon QR codes list for adding all Pokémon to your Pokédex.

Pokémon Ultra Sun and Ultra Moon Kahuna Olivia's Grand Trial for Rockium Z

Alright, at last it's time to face Kahuna Olivia.

The glamorous Island boss is a wielder of, you guessed it, Rock-type Pokémon. With a fairly diverse set of second types though, the only common weakness her Pokémon have is Steel, but you'll also do well against two of her three Pokémon with Water and Fighting-type attacks, too.

The main threat is her Midnight Form Lycanroc, which thankfull is in the slowest of the three Forms, but can deal out some substantial damage. Otherwise, keep your Fire and Flying-type Pokémon at the rear of your party, and you should be fine!

Next up: Ultra Sun and Ultra Moon - Hano Grand Resort, Hano Beach and the Aether Foundation

Defeat Olivia and you'll be rewarded with the Rockium Z Crystal, supercharging a Rock-type move in battle. Hau arrives right after you finish the battle, but your next stop is Hano Grand Resort, to chat with that strange man you met a little earlier...