Only two days? wow!
I think I can finish this in a week or two.
edit: the fall through floor glitch saved quite some time on the Mansion, I'm now
01:25.78 (5147 frames) ahead up to the third boss.
edit 2: I discovered a very effective combo against bosses, now I'm
01:44.55 (6273 frames) ahead, still up to the third boss;
start any combo, after the second hit press down for one frame, wait 9 frames then forward+Y.
(I think it's not even possible to do it in real time, at least for me...)
edit 3: Still stuck on the third boss, it's kinda hard to manipulate his head off screen:
http://dehacked.2y.net/microstorage.php/info/330585000/Dooty-Nosferatu.smv
also, the new combo is pretty much useless against it, so I'm considering the possibility to collect some red crystals.
edit 3: two normal punches between the jump-kick and no crystals are needed. I'm now
02:35.03 (9302 frames) ahead up to the fourth boss.
edit 4: I'm now
02:52.65 ahead after the fourth boss thanks to a new glitch, I'll call it "blind play" for now.
edit 5: wow, it's also possible to enter walls using the fall through floor glitch, so I'm going back some stages to test it, let's see.
Last edit: Couldn't find any way to save time on the walls that is possible to pass through, I'm in the midle of the final stage now,
03:22.72 ahead and it will be submitted soon.