Sprunki began as a fan made mod of Incredibox shared on Scratch in 2024, mixing cute cartoon singers with a darker horror mode. Mr Sun was one of its melody characters, a smiling sun who adds a light tune to the group performance. As Sprunki clips spread across YouTube and TikTok, fans made updated versions including Sprunki Retake, which redraws the characters and refreshes their loops. The Mr Sun part stayed popular because its cheerful pattern is easy to recognise, easy to loop, and works outside the game as standalone background music.