The yellow Dr. Mario represents Dr. Lobe, the host of Big Brain Academy who features a yellow color scheme.
The purple and white Kirby minions represent the floating picture and its matching shadow featured in the Big Brain Academy minigame, Shadow Shift.
The stage represents PictoChat, an art-genre game which was released on the Nintendo DS along with Big Brain Academy.
The High Gravity and Low Gravity hazards reference the main gameplay of the Shadow Shift minigame where correctly matching the object's shadow will cause the next set of shadows to float.
Other trivia:
This spirit's Support type references Dr. Lobe's role in Big Brain Academy as the player's guide and headmaster.
This spirit's Mr. Saturn Equipped ability references the simple design and color scheme of the blob-like characters in Big Brain Academy.
