I also discovered yet another out of bounds glitch utilizing the enemy in Dozing Sands that normally you jump on and frame-perfectly time a second jump after fleeing the battle. Using that enemy, and running between up of up left and left of up left against the rocks to the left of that same area, fleeing the battle with that enemy changes Mario & Luigi's collision for just long enough for the bros to clip into it when you gain control again. This only works if you are rocking the circle pad between left of up left and up of up left along a specific part of that wall, which you can see in my video below.