What are, in your opinion, the cheapest attacks you've seen in a Megaman game? For me, I'd have to say that most of them come from Network Transmission; some of the attacks were unavoidable.
Protoman EXE's Surprise Slash~Network Transmission
Very cheap tactic; Protoman dissapears and gets directly next to you, immediately doing a wide slash. It's literally unavoidable; jumping or sliding will not save you. Without a barrier or Invis chip, you're done for.
Zero.EXE's double wave~Network Transmission
Zero fires a double slash wave, similar to the ones fired by Double and Fenri LunaEdge. My question is, how does Megaman avoid this if he can't wall jump. Guess what, he can't.
Tornadoes~Air Man
I never did like this move. Over the years, I've gotten exceedingly better at dodging these, but it's still an annoying move. The fact that wind is blowing makes it all the harder to jump over, and he does them in volleys too. And people wonder why that song is so popular.
There's some more, but I can't remember exactly what they were at the moment.