Odion, known as Rishid in the Japanese version, is an opponent in Yu-Gi-Oh! Nightmare Troubadour. This is a videogame version of Odion, a character from the Yu-Gi-Oh! anime and manga.
The player faces Odion, pretending to be Marik, in a Shadow Game after defeating a Marik-controlled Tea. After his defeat, Odion falls unconscious, leading to Yami Marik taking over Marik's body.
After finishing the game, Odion becomes friendly towards the player and challenges them to normal duels instead.