Intro. To get revenge, Ikki stole the parts of the Sagittarius Armor and challenged the other Bronze Saints to a battle for it.
Lizard Misty, a silver knight sent from the Sanctuary to assassinate the bronze knights, made his presence noticed when he caused the mountain to collapse, burying Ikki in the process. Mu and Kiki teleported the Bronze Saints and the Black Four off the mountain, while Ikki chose not to use teleportation.
To remove Shaka from the other bronze saints' path to the Pope, Ikki decided to sacrifice his body and cosmos when he tried to eject himself and Shaka to another plane.
In the manga, Ikki was defeated by Saga's second Galactic Explosion, leaving others wondering if he was alive or dead. In the anime, Saga only used his Galactic Explosion in the third film. In fact, Kanon was the first to use it against Ikki in the anime.
After the Sanctuary Chapter in the manga, Ikki only resurfaced to take revenge on Lymnades Kayza, one of the generals