The first Kirby game to reflect Galaxia's design in the anime is Kirby Air Ride. It has never been called by its name in the games, but Super Smash Bros. Brawl references it with Meta Knight's final smash, Galaxia Darkness. It is shown in Meta Knightmare Ultra it can absorb power from defeated foes to use moves like Knight Call, Meta Quick, Heal, and the ultra lethal Mach Tornado.
Anime EditMeta Knight uses Galaxia throughout the whole series. This is the first time that Galaxia is directly referred to. The only episode to give its back story is "Crusade for the Blade." Kirby uses it in "Hour of the Wolfwrath/Sword and Blade: Loyal and True" to destroy Wolfwrath and in "Crusade for the Blade" to destroy Kirasakin.
Galaxia was forged by the legendary Photron, leader of the fire people, and captured by Nightmare. He gave it to Kirisakin so that he could guard it. Meta Knight was able to get it back, but not without his partner Garlude needing to sacrifice herself.