GBA Info
Super Mario Advance 3: Yoshi's Island is the port of Yoshi's Island to GBA, It is a very faithful port but has some small differences in levels with new sounds but with the downside of a smaller screen.
Most importantly due to it being a new system, there are differences in how some glitches that corrupt memory work especially OAM overflow and Out-Of-Bounds wrong warps. This leads to GBA having unique speedruns that may be interesting.
Note that this is under investigation and information may change and this is still not fully understood
Goal OAM Overflow Corruption (unlocking new levels)
TODO
Explain, link some pablo stuff
Wrong Warps differences
TODO
GBA doesn't clear previous screen exits from levels you visited so 1-1 warping can bring you there. Out-of-bounds warps read into VRAM table so it can be manipulated into many places
World Records
Somebody has done it