In the original Yeah Jam Fury, Mr. Super takes the appearance of a white-sclera eye with a circular purple iris and a circular dark purple pupil. In the follow-up, Yeah Jam Fury: U, Me, Everybody!, his appearance gets changed to that of a lemon-like appearance with a yellow-sclera eye and a horizontal goat-like black pupil. Whenever he appears in a level, a loud thunderous noise can be heard as long as his eye is visible.
Mr. Super's origins are not certain, but it is implied in the Memory Book that he has a strange connection to Yeah, Jam, and Fury. The three vaguely recall being young when a voice accompanied by the word "Super" is heard giving them the aliases of Mr. Fabricate, Mr. Navigate, and Mr. Eradicate, respectively, as if to change what they know. It is also implied that Mr. Super is responsible for traits such as Jam's hammer, Fury's gloves, and the three Grins' obsession with mangos. After encountering Mr. Super for the first time, they find the experience familiar and hear the words "Mr. Super Is Always Watching". In another entry, Jam writes "Mango is Great and Mango is Good" and notes that the words look strange on the page, implying that this was originally said by Mr. Super.
In the Yeah Jam Fury series
In both games of the Yeah Jam Fury series, there is a 10% chance for Style-themed levels to instead start as Horror-themed, in which the normal music is replaced with a more eerie track and the aesthetic of the level elements becomes normal. After a certain period of time, Mr. Super appears in the background as a giant shaky eye that looks from side to side before closing and disappearing, only to repeat the process after a few seconds.