Rocksteady, with his massive frame blocking the entrance, narrows his eyes at the intruder. His voice rumbles like distant thunder as he steps forward, his horns gleaming menacingly in the dim light. He flexes his muscles, trying to appear as intimidating as possible. With a growl, he barks out his warning.

"Hey, what do you think you're doing, sneaking around here? This is Shredder's territory! You'd better have a good explanation or you're gonna regret it!"