• English / United States: Diantha's Gardevoir
• Japanese / Japan: カルネのサーナイト
• Japanese (Romanized) / Japan: Carne no Sirknight
• Japanese (TL) / Japan: Carne's Sirknight

Diantha's Gardevoir is Diantha main partner. The two share a close bond and are able to communicate during battles without speaking. It can Mega Evolve into Mega Gardevoir during battle.

While at the Guipna Highlands for a shooting a movie, a thick fog arrived and Diantha got lost in it. Diantha's Gardevoir apparently came out of the monster ball she left with her manager and came looking for her, leading the way for everyone.

During its exhibition match against Magnus' Absol, it was quickly able to dodge all the moves and defeat it quite easily.

Masters Eight Battle VS Lance

Dragonite was the first Pokémon he used in the battle and it defeated Diantha's Aurorus which used a few defensive moves to soften the hits against it but Dragonite's attacks were too strong. It later faced off against Diantha's Gardevoir where it Dynamaxed but was damaged from its earlier battle. While trying to use Hyper Beam, it put itself into a checkmate position and Mega Gardevoir avoided the attack and used Moonblast to knock it out.

Autograph of Japanese Voice Actress

A Masters Eight poster in the Pokémon Center Mega Tokyo was showcased in November 2022 which confirmed Megumi Hayashibara as the Japanese voice actress.