I had an idea. To join in on the Level Creator, players could download a Character Creator. They can create up to two custom characters. They can make the sprites, and stats for the character. However, the characters during in-game get a note when selected:
"WARNING: Playing as a custom character does not affect the story line, all cutscenes will be removed during custom character gameplay."
"WARNING: Playing as a custom character does not affect the story line, all cutscenes will be removed during custom character gameplay."