In 2-player mode; when in a capture and using Cappy flight, if Cappy interacts with an object that causes the second player to lose control of Cappy temporarily (such as a lamppost, pole, switch, turnip), this will force the Mario player to be released out of the capture they are currently possessing. If this is done whilst directly underneath a ceiling Mario will be released through the ceiling and clipped out-of-bounds. This works for captures: Frog, Goomba-Tower, Cheep Cheep, Coin Coffer, Lakitu. Discovered by Syrkl

When underneath a corner as a Cheep Cheep capture, hold A or B to swim upwards whilst barely trapped by the corners overhang. Now press ZL or ZR to release from the capture and Mario will clip into the corner out of bounds. This can by quite finicky and will require some good positioning as well as luck. Discovered by Syrkl

In the Shiveria sub-room, Hollow Crevasse, you can clip through the far wall close to the water by exploiting the small gap created when a Bitefrost rises. Being on the side closer to the water increases the chance for the wall-clip. One way to do this is to slide down the wall as the Bitefrost rises from the ground and then perform a roll into the wall whilst in the gap. Discovered by Syrkl

Land on the railing north of the manhole whilst riding the scooter. Your angle must be so Mario is facing directly at the wall; bounce once or twice to make the scooter move backward off the railing and as soon as the scooter tilts to a steep angle (Mario facing the sky) hold accelerate. The clip itself is very luck intensive and can take multiple tries. After clipping, immediately jump off the scooter and make your way to the Manhole and loading zone to the Sewer. This skips the Manhole capture for certain Low% categories. Discovered by Mnyush & Syrkl