History
Decidueye debuted as a Dartrix in No Stone Unturned!, where it was first seen training with Hau. It fired a Razor Leaf, which ended up hitting Ash, Rotom, and Pikachu. Hau later used Dartrix in his battle against Ash, where it went up against his Rowlet. With Rowlet having a tendency to fall asleep, Dartrix had an advantage and was able to knock Rowlet out when Ash struggled to find his Grassium Z.
The next day, Dartrix had a rematch against Rowlet, and this time, it was defeated when Rowlet used Bloom Doom.
In League Offenders and Defenders!, Dartrix was revealed to have evolved into Decidueye when Hau met Ash and his classmates at the Manalo Conference. Hau later used Decidueye during the battle against Team Skull, where it went up against Rapp and her Zubat and won.
In Imitation Is the Sincerest Form of Strategy!, Decidueye went up against Ash and Rowlet in the second round of the Manalo Conference. Rowlet attempted to attack with Bloom Doom, but Decidueye was able to dodge it before firing Spirit Shackle at Rowlet, which prevented it from escaping. Hau and Decidueye then performed Sinister Arrow Raid, but Rowlet narrowly escaped the attack. The match continued in the next episode, where, after a collision between Sky Attack and Brave Bird, Rowlet looked like it was unable to battle, only for Hala to realize it was actually sleeping. The match recommenced, with Decidueye hitting Rowlet with another Spirit Shackle before launching another Sky Attack. However, Rowlet was able to dodge it with Feather Dance before knocking Decidueye out.
Decidueye reappeared in a flashback in Final Rivals!.
In Z-Move Showdown!, Decidueye was used to battle a Shiny Guzzlord to prevent it from the destroying the Manalo Stadium. With a combination of Z-Moves, Decidueye, among others, managed to send the Shiny Guzzlord back into its Ultra Wormhole.
From Exhibition Unmasked! to From Z to Shining Z!, Decidueye was seen watching the exhibition match between Ash and Professor Kukui alongside Hau.
In Thank You, Alola! The Journey Continues!, Decidueye was seen battling Nanu and his Alolan Persian.
In Helping the Hometown Hero!, Hau and Decidueye appeared watching the Battle Royal match between Ash, Professor Kukui, Gladion, and Kiawe.
Personality and characteristics
Decidueye's rivalry with Rowlet
Decidueye has a clean and fashionable personality, as seen in No Stone Unturned!. It also shares a close bond with Hau and takes battling very seriously. In addition, Decidueye maintains a friendly rivalry with Rowlet, to the point where they even have their own signature handshake. After it is defeated, Decidueye accepts the outcome graciously, as seen in Battling on the Wing!, where, despite losing to Rowlet, it happily shook one of its feet with one of Rowlet's. Decidueye showed concern for Hau following his loss during the Manalo Conference, as seen in SM133, showing its strong bond with its Trainer.
Moves used
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| Using Razor Leaf
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| A † shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.
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| Using Sinister Arrow Raid
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| A † shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.
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