The Spore Creature Creator allows you to create any character you can imagine and a lot of people have been growing their own video game character. Here is Mario's enemy Bowser:

The Spore Creature Creator lets you build your character using 228 flexible parts that you build via drag-and-drop. After building the creature, you can paint the character and also bring it to life with poses, emotions and even teach it how to dance. Spore Creature Creator is available for both PC and Mac.

You can get your hands on it here: Spore Creature Creator


Get the Spore game.