Let's revive another dead thread! This revival is about 1 year. But trust me, I have a good reason.
Recently, on Starmen.Net, some people discussed a "go through walls" bug that they had found. Naturally, it got my interest, and I proceeded in recreating this bug, and finding a new place to use it.
Here are 3 short videos showing the glitch in action:
Peaceful Rest Valley (Perfectly TASed)
Lilliput Steps (Played in realtime, using rerecords)
Saturn Valley (Perfectly TASed, but totally useless)
The Peaceful Rest Valley and Saturn Valley glitches were already discovered by other people, I just replicated it, TAS-style. The one in Lilliput Steps, though, I found myself. However, I was not able to do it TAS-style. I could do it, but I wasn't patient enough.
These 3 glitches are the only ones I could find when doing a quick sweep of the game. I watched the TAS, and when I thought I saw a glitchable wall, I tried to glitch through it. I only found these 3. There might be more, though.
So there you go. New glitch, new time savers. Hint: the Peaceful Rest Valley one saves about 35 seconds.
EDIT: I edited the submission text to take into account this new glitch. I added it in the "tips and tricks" section, as well as in the "possible improvements" section. This way, all the improvements are at the same place, and not scattered all over the Internet.