Before the final showdown begins, Oiram reveals that he had been helping Bowser with his plan, but made a mistake during his assistance. The Koopa King had meant to simply send Mario back into 1981, but something had wrong; Mario was instead transported to the events of Donkey Kong. This was because Oiram had accidentally bumped into Shadow Mario, which made a collision of history and caused Bowser's doomsday device to confuse the Mushroom Kingdom of 1981 for Brooklyn, New York, where Donkey Kong apparently took place. Then the path of history in the entire meta-universe started to collapse in on itself; timelines were either mixed together or torn apart. Oiram also reveals that he is the key to Bowser's long-hoped-for timeline: the timeline in which Bowser had controlled Mushroom World for over 25 years. Then he says, "Now that the multiverse's history has been scrambled, I might as well destroy you so I can give Lord Bowser the timeline he always wanted."
In the LapisverseOiram appears slightly different in the Lapisverse, his first appearance being in Fighters of Lapis 4/వరల్డ్స్ కలయిక. After Mario and the others broke the copies of the Mirror of Truth, he appeared on the other side of Mario's mirror. Unlike the rest of the dark clones, he seems to understand he is a clone but still wants to take the original's place.
Oiram also has a red cap, as opposed to his normal blue cap in the rest of his appearances. He also has a shadow-being following him, along with shadowy arms. The shadow seems to morph in shape and the arms being the only physical part of the shadow being.
He is also second in command of the Fusionist's troops.
- "Now look what we have here... Mario, that infernal copy of mine."
- "Lord Bowser will crush you for beating me up!"
- "Ha! You think Lord Bowser came up with his master plan all by himself?"
- It is rather confusing that the adult version of Oiram has different-colored clothes and skin than his infant form, as most characters in the series look very much alike to their infant selves, except for some added visual appearances or changes (i.e. adult Mario has a moustache, adult Peach has longer hair and a dress, adult Bowser has a larger shell, etc.).