Well it was based on that one video where they reimagine the chocolate bar episodes but in the fairytale style

https://youtu.be/qXmgFteVIps

Here's the early rough sketch on figuring out what he would have looked like, an unused alterations color palette from season 1 but I made it more like the cracked cel you see years later. Then I later used the real cels from but carefully pick out.