Hm I think I know how to do it but I havn't tried.
BTW, does anyone know if it is possible to smuggle items into the minigame because if you can, it could be a possible RWT method since you can give items to anyone inside the game.
Although, all items in the game may delete when the game is over so not sure.
I figured out how to get items into the waiting room but doesn't let me bring them into the game. Also tried putting my items into a familiar or lending an item to a friend while in waiting room. Does not work.