I just realized almost at the end of the first stage that I did it on the (E) rom instead. The glitch works on the (U) rom, but for some reason the lag between rooms is a bit different. I can check which language option is faster I guess.
That, and apparently this glitch works on floors, allowing very quick movement. You can also make it last farther by swapping partners midway.
Edit: I need to redo the first stage anyways:
I found out if you go fast enough, you can enter the dark as Shaggy and still switch partners,
skipping the wrench and lamp. You still need the lamp, since you can't get to the room otherwise.
Edit: Stair clip
https://www.youtube.com/watch?v=MNbs7u1eXYI
I did this and now I can't seem to repeat it again on other stairs. bleh.
Edit2: I think I figured it out. Apparently using the swap glitch at a certain angle makes you clip slightly into the stairs. Holding the opposite direction forces you inside. It doesn't seem to work for all stairs, but I tried to apply it as much as possible:
http://tasvideos.org/userfiles/info/30113611229916405
Funny thing is, this was done on (E), but I accidentally switched to (U) sometime during the middle and never noticed. Curiously, it syncs back on both versions as long as the region select delay remains for (U). Attempting to cut it out changes RNG. :/
Edit3:
Managed to improve 200 more frames by clipping into another set of stairs. For some reason, I can't seem to be able to do so on these ones:
http://imgur.com/a/bRBLH
There's currently 2 locations so far that will save time if someone manages to clip through them, and I suspect the list will grow.