Biolizard

A massive dinosauric creature created by Gerald Robotnik. This creature is said to be so powerful it has been dubbed "The Ultimate Lifeform". The Biolizard was created to avenge Gerald Robotnik's murdered daughter Maria and was finally defeated by Shadow the Hedgehog, another one of Gerald's creations. It also has the ability to become the Finalhazard by merging with the ARK.