For the moment at least it seemed like John was okay, even if his pride was hurting considering the change, but Kitty was more concerned with his physical well being - well beyond the change at least, the rest was beyond their control for the moment. But he wasn't hurt by the fall thankfully, so she could focus on trying to fix this.
"Okay so Mario gets them and they don't last long at all, Toadette had this but she changes back when she does, it sounds like it's going to be a temporary thing." She said returning her attention to John trying to reassure him that this wouldn't be a forever thing even if they didn't have the benefit of Toadette or anyone else who might not what to do about this.
"What do you think?" She asked John then, "Do you want to stay and look around some more?" She offered, but considering the circumstances she wouldn't be surprised to learn that John wanted to get out of this place. "Or do you want to go home instead?"