With the age of the ruins, it's often difficult to tell exactly what's been 'in-use' more than something else, but luckily this isn't one of those cases. There's chips in the handle of the switch within the door alcove, while the one outside looks pristine and unmarred (if a bit dusty). The only catch, is that he's going to have to walk a few feet through the door to reach it, stepping beyond the open doorway.

"Huh.." Klonoa says, examining his part of the room. "How does it look over there? Are you seeing the same thing?" He calls out.