I found the Rockman 2 hack
Rockman Deus Ex Machina. While yes, it has parts of the turned up difficulty for no reason many hacks suffer from, it's not AS bad as many others, and it's definitely the most innovative Rockman 2 hack I have played.
It's not the first one I've played where Items 1, 2 and 3 are changed, but it's the first I've played where they're changed to this degree - 1 activates temporary invincibility, 2 makes a small extra jump in the air allowing you to practically hover as long as you have energy and 3 is a high jump. No Items are actually spawned.
Some puzzles are done in ways I haven't seen in hacks before. All background music is changed. Boss patterns and weaknesses and subweapons are all changed. Stage graphics and background music are completely redone.
I'd probably call this the second best Rockman 2 hack I've played, with #1 being
No Constancy.