Darth Vader, is a powerful Dark Lord of the Sith, Vader serves Emperor Palpatine as Supreme Commander of the Galactic Empire and plans to find Kingdom Hearts for its power to control the universe. He is also one of the recurring antagonists in Kingdom Hearts: Shadows Of The Past and ally of the Kage-Shin to complete this goal.
Kingdom Hearts: Shadows of the Past
Darth Vader's shuttle landed on Radiant Garden to greet the leaders of the planet, acompanied by their new allies who saught to help the inhabitants after their past encounters with the Heartless and Organization XIII. Upon his arrival, meeting the famed keyblade Wielders who defeated the organization; Sora, Kairi and Riku.