Hau's Decidueye

This Decidueye is a /-type Pokémon owned by Hau. It was formally a -Type.

As Dartrix
Hau used Dartrix in a battle against Hala's Crabominable. However, Dartrix lost the battle, and Hala advised Hau to train more before Hala could use his very best to battle him.

Hau trained his Dartrix, until it fired its quills to bind Ash, Pikachu and Rotom to a tree, suspecting them to be its enemies. After the group cleared the misunderstanding, Ash's Rowlet woke up, and was introduced to Dartrix, who tried to fix its bad hair. The two started a battle; Dartrix used Leaf Blade, but crashed when Rowlet evaded the attack by falling asleep. The two sides used Razor Leaf, but Dartrix's attack was much stronger and negated Rowlet's. Ash went to have Rowlet use the Z-Move, but failed to equip his Grassium-Z. Thus, Rowlet got knocked onto Ash and Pikachu by Leaf Blade, a move that defeated Rowlet. During the rematch the next day, Rowlet used its newly-learned move, Seed Bomb, at Dartrix, hitting it, then went to use Peck. Dartrix retaliated and hit Rowlet with Razor Leaf. After using Leaf Blade, Dartrix bound Rowlet to a tree. Rowlet attempted to attack with Seed Bomb, but his Everstone that he used for the attack was knocked away by Leaf Blade To reverse the situation, Ash empowered Rowlet with Z-Power, freeing itself and using Bloom Doom. The Z-Move defeated Dartrix in an instant.

As Decidueye
When Hau met Ash and his friends at the Alola League, he show them that Dartrix evolves into Decidueye and Decidueye also greeted his old friend Rowlet. Decidueye Was then used in a battle against Team Skull.

Voice actors

 * Shin-ichiro Miki (Japanese)