Mr. Mysterio

Another of Fusion's godmodding characters, he is described as the strongest phantom in the world. He appears in The Day Wario stole practically Everything and Everyone Else had to Save the Day as Fusion's first Author Character in the OG until being phased in, and in Member OG. In MOG he meets the group when they're tossed into the future, described as a man in purple robe and hood and "phantom, exorcist, psychic, and wizard at your service". Also he is immortal. He travels with them back to the present before being forgotten by the story.