OiramOiram12345 is MarioMario54321's doppelganger.
He first appeared in The Fury of CandyCao7 by MM54321. He then appeared in OO12345 and the Shadowreavers (MM54321) as the main antagonist. His final appearence was OO12345 and the DSX (MM54321), where he called himself the master of the doppelgangers and the creator of the Dark Star X. He merged with it to become OO12345 X, but was defeated and went away into Dimension X.
He also has appeared in other videos of MM54321.
- Star World counterpart: StarioStario54321
- Fourth Dimensional counterpart: QuarioQuario54321
- Crown Dimensional counterpart: QuinarioQuinario54321
- Mushroom Kingdom/Blooper Land counterpart (doppelganger): MarioMario54321