Shadow Mario is a creator of multiple Releasio games. He has worked on Super Releasio Bros., Super Releasio Bros. 2u, Super Releasio Kart, and Super Releasio Kart 64.
Shadow Mario appeared As an unlockable character in Super Releasio Bros. 2j: The Lost Toads, and can be gotten after reaching Void-9.
He used to be a Traitor Toad, but he learned from his mistakes and now faithfully serves Toad. He even runs the news publication Toad News.
Shadow Mario also made Super Oofio 64 to make allies for the Toads, but they got out of control and became enemies in The First Toad Crusade.
Shadow Mario's Avatar: