Here is a set of eggs colored and drawn by my daughter this year. The figures are Armless Bipedal Cycloptic Demons, or ABCDs. The ABCDs were created initially as part of an online project by the Talkhaus online gaming community for an event they titled A Super Mario Things (ASMT for short). Carly drew several of the characters from the ASMT, and created her own ABCDs based off the motif.
So the pictures start with a display case of the eggs, and then individual close-ups of eggs. Once you get to the close-ups, the list of who they represent should be: