MM1 doesn't allow to jump through boss doors? NO. BAD CAPCOM. BAD!
God, I'd kill for a Megaman collab. It's without question my favourite franchise, and outside of some games I have absolutely no way to play yet (Megaman 9 to 11, Megaman X8, and some obscure titles), I sampled them all. Perfect ran almost all the classic, Zero, ZX and X series buster/saber only, only leaving stages that are RNG bullshit. glares at Quickman, Slashman, and Megaman and Bass's Tenguman, amoung others. I could discuss that franchise for hours, and Megaman Zero 3 and Battle Network 3 are amoung my top fav games of all times.
P.S: If you never played a megaman game and want to start with an example, I HIGHLY recommend... Fangames. Free, long, and very easy to find, although the quality is almost exclusive to the Classic series. Megaman Unlimited is a *kick you in the balls repeatedly but fairly" game, Megaman Super Fighting Robot (description) is a fair and smart game, and Megaman Rock Force is my favourite Megaman Classic and third fav Megaman game PERIOD.
... Why did I type all this?