Lillaby is a monster in Sonic Origins that was originally planned to be just a regular monster and Sonic and Tails would have to fight her on the Angel island mountain. But in the final version of the game, she is relocated to the Vampire zone where she is in a pool of black lava. Sonic or other characters has to fight her by punching two purple bumps and puching all of her eyes off. After you defeat her, she turns back into a purple hedgehog with voodoo clothing.