I haven't tried that one yet but I'm really not a fan of how every boss so far seems to have invincibility frames.
Pyro in particular is annoying because of how his attacks all look the same but have no clear pattern, and you only get a second or two for clean shots.
Pyro is easy. He has voice tells for each of his different moves. Like he'll say "crush!" if he's gonna do a bellyflop, or "here we go!" if he's gonna explode midway through. He says nothing if he's just gonna run across the screen.
I might have the exact quotes slightly off, but the voice tells make this game vastly easier than Mega Man in general I think.