Mega Man 3/Doc Man in Gemini stage

In Gemini Man's stage, Flash Man and Bubble Man are hiding out.

Flash Doc Man
Flash Man's arena is full of platforms, much like it was in Mega Man 2. This would make you think that Gemini Lasers might be good. But because of the platforms, the laser will bounce all over the place, rarely hit him and you'll die before the second one gets him. Needle cannon seems to be the best thing to get him.

Bubble Doc Man
The thing about Bubble Man is that the ceiling is covered in spikes. Spikes means instant death, so there isn't much room for jumping. This guy can be easy if you use Shadow Blades. It's helpful when Bubble Man is jumping to fire them overhead, too.