I found out a small improvement to Launch Base 2, over and above the zip -- it is... well, you should
see it for yourselves. The included savestate is needed to be certain of the results, as I started from a save where Launch Base 1 had been finished the glitched way.
In this video, I skip the mid boss, skip the Knuckles cutscene and glitch into the Knuckles boss area. Unlike Knuckles, I only have fight the first of the bosses as the trigger is based on selected character. The level is faster, ending at 0:26::26 (32 frames faster, may be possible to improve slightly more), and there is an awful lot of time saved by dodging Knuckles -- the level spans
01:17.38 from the beginning of Launch Base 2 to the start of Mushroom Hill 1, versus
01:53.20 I had published earlier -- which means savings in real time of
00:35.82. The down side: the transition cutscene at the end is takes 0:31::25 instead of 0:17::53, a loss of 13 seconds and 32 frames in in-game time.
I am leaning more towards the gain in real time in this case, as I gain almost 3 times as much real time as I lose in in-game time. What are your opinions?