As an amendment to the previous post, a route for the capsule warp has now been found that works on original hardware. Compared to the previous route, this route will be valid for any% runs.

In short, the new route works by setting up the capsule warp glitch by using the capsules on the "medrizine" (the bottle on the very right on the middle shelf) then warping to the bathroom stall (move top-left in the move navigation area). Take a death by consuming the capsules, then upon respawning the door on the top-right of the move navigation area can be opened and moved through without the game locking up.

The Mesen emulator seems to still have reflected all these discoveries accurately so use that or original hardware for future reference.