Guest Bratti
From left to right on the southern side of the room, use Lunch to step on the 2nd, 3rd, 4th, and then 1st pressure plates (in that order) to complete that row. Be careful not to walk over any already activated plates when heading back to the 1st plate, as it will reset the puzzle. You need to use Tunks to cross the chasm, as he is the most agile. Now, from left to right, step on the 4th, 3rd, 1st, and 2nd pressure plates.