Protoleupaks are the earliest made forms of leupak. They are little more than giant, bloodthirsty lizards set only on extending the existence of their race. Protoleups barely have common sense-they often make bad acquaintances with anyone they meet. Protoleupaks never attack with a bite-they prefer using their tongues and claws.

They can easily be killed with slime antidote A- a mixture of liquid nitrogen and ground diamonds.

Green leupaks are often referred to as "original" leupaks. They can spit green slime that, if swallowed, transforms someone into a green leupak- this can be reversed with slime antidote A or B-distilled hawk blood and faerie dragon wings. They will use any attack mode that will get rid of an enemy while providing some entertainment.