In Mrs. Puff's sprite sheet for SpongeBob Saves the Day!, an image can be found of an unnerving semi-realistic CGI character, internally called "Yummer". The character's unsettling design, combined with an image present in the code of Sandy's torn-up scuba suit, caused a lot of speculation about the image's potentially macabre origin. The original creator of the graphic eventually came forward and revealed that the character was simply a developer in-joke from the late 2000s used as a placeholder for a scrapped feature where an undecided character would peek from the back of one of the Krusty Krab's poles. The character's name is also not "Yummer", but rather simply "Yum", named as such because "that's the opposite of what you'd use to describe him". The torn Sandy suit was part of a puzzle where SpongeBob would need to wear one of the treedome's helmets.

When SpongeBob is on-stage in Nickelodeon All-Star Brawl, he automatically activates a code titled "yummerSummon" - this does absolutely nothing, and serves as a comical reference to an infamous unused graphic in SpongeBob Saves the Day! for dataminers to discover. The Yummer graphic is not known to exist in All-Star Brawl.