One of the many post-game activities you can do in Pokémon Sun and Moon is getting Eevium Z by finding all Eevee User locations.
The quest has you visit a supermarket worker who went on the island challenge in his youth, and wants you to locate and beat eight Eevee evolution trainers across the world as a favour.
Like other storylines in Sun and Moon, it can be surprisingly dark at times, but is a simple quest of working out the specific locations of each Eevee user, giving you one of the more elusive Z Crystals in Pokémon Sun and Moon.
Once you get it, Eevium Z gives Eevee the Extreme Evoboost Z Move, which sharply increases all of its stats in battle. We'll be interested to see how the community and competitive scene takes to this, as in theory it could be effectively be combined with a variety of other moves.
Need more tips? Use our Pokémon Sun and Moon Walkthrough and guide for the main story, our choice of the best Pokémon Sun and Moon starter from Rowlet, Litten and Popplio, as well as an in-progress list of where to find Zygarde Cells and Cores and our guide to the Battle Tree and both Battling and Trading in the Festival Plaza. We also have a list of QR codes list, Z Crystal locations, Mega Stone locations, Eevium Z Eevee User locations for Extreme Evoboost, evolutions for Alolan Forms and other new Sun and Moon Pokémon and fast way to increase a Pokémon's Happiness, plus how to transfer across Ash-Greninja from the Sun and Moon Demo, where to catch the Tapu Guardians, how to catch the Ultra Beasts, and how to download the Munchlax Mystery Gift.
Eevium Z Eevee User locations in Pokémon Sun and Moon to unlock Extreme Evoboost
As the champion, go to the Thrifty Megamart on Royal Avenue and chat to Kagetora behind counter near the bottom, who challenges you to find and defeat eight Eevee trainers.
After hinting at where they were in his youth, you have to narrow down his clues to specific locations. They are as follows:
Vaporeon User Polly location
Head to the Trainer School on Melemele Island. Go up to the third floor, and she's on the right.
Flareon User Chad location
On Akala Island, go to the Tidesong Hotel. Go left once inside, and he'll be standing by the wall.
Jolteon User Jane location
Head to Malie Community Centre on Ula'ula Island, and she'll be sitting on the sofa to the right.
Espeon User Ishaan location
Go inside the Geothermal Power Plant on Ula'Ula Island, and chat to the person watching TV in the far left corner.
Umbreon User Braiden location
On Melemele Island, head to Hau'oli Ceremtory and converse with the man by grave in the upper left corner.
Glaceon User Rea location
On Melemele island's Iki Town, head to the far left house, and chat to the lady in the kitchen.
Leafeon User Linnea location
Go to Hano Grand Resort on Akala Island, but don't go inside. Instead, go right onto the beach and follow the sea north, round the rocks, and chat to the young-looking woman there at the end.
Sylveon User Kira location
In Seafolk Village on Poni Island, head to the Steelix boat on bottom right, and chat to the young girl inside.
Once you have defeated all eight Eevee Trainers, Eevee User Kagetora will challenge you to a battle against his level 57 Eevee back at the Thrifty Megamart on Royal Avenue. Defeat him, and the Eevium Z Crystal - and Extreme Evoboost Z-Move - is yours!