I haven't watched any runs (so I don't know if this glitch is known already and/or useful) but I was playing through the game casually and something interesting happened. I was able to pull up my pause menu and the "PC" menu at the same time, leading to a bunch of weird interactions. IDK how I did it, but I have clips if anyone wants to recreate the glitch and see what may be possible.

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I am not sure if this will be useful to anyone, but when playing casually on emulator I managed to clip out of bounds while playing spheda. The ball was close to the exit in moon flower palace, I selected to ball, and what do you know I am clipped out of bounds. Messed with it a little and took a few screenshots, pretty positive it is a useless glitch but I figured I would let you guys know. http://imgur.com/3uwLNYS and http://imgur.com/j0Uo2Wl