The first design of Pop-Up comes from an old, unreleased project with old assets. The project was made for a show called "Cyber Showdown," a typical object show but with digital characters. Pop-Up used to be a narcissistic, mean character. Pop-Up isn't really narcissistic nowadays. They're more like someone who likes attention. There's a difference.
Fun Fact: The first design for Pop-Up never appeared in an official project. It was left in an unreleased project with other internet-inspired object characters.
