Films
- Ko-Ko makes a couple of cameo appearances in Who Framed Roger Rabbit. He is seen walking in the background during the scene where Eddie is leaving Maroon Cartoon Studios, and is among the toons gathered at the Acme factory in the final scenes.
Video Games
- Cuphead takes stylistic inspiration from the Golden Age of Animation and quite a bit of specific inspiration from Fleischer Studios productions. Inkwell Island is named after the Out of the Inkwell shorts.
Web Videos
- Super Eyepatch Wolf's video Why Cuphead Looks So God Damn Good
includes a short clip of Koko when talking about the era of stylization that inspired the game's visual design, and how specific classical cartoon characters are referenced in the design of each boss.
