I've always wondered how prepared Team Meat was for that someone out there would be lacking sanity and try to clear the Dark World before clearing the Light World. I
am that sanity-lacking someone.
I purposely did not clear Dr. Fetus' stage in the Light World to unlock the Cotton Alley so I could clear the ENTIRE Dark World (imagine the look on my face when I saw the requirement was only 85 Dark World stages, not 105) so I could tackle Dr. Fetus' Dark World stage so I could do a sequence break and potentially discover if doing such a sequence break would not unlock the Cotton Alley: a bug that I wanted to report but was not far enough in the game to check for myself at the time that the thought came to my head.
Through the past two weeks of on-and-off playing through the Dark World, I have results.
Dammit, Team Meat, you guys anticipated everything