Mega Man 9

In a recent interview, Mega Man producer Hironobu Takeshita revealed that Mega Man 9 will include many of the same bugs from the NES originals. Screen flickering and NES sprite limits. But there is also an option to disable this.

Yeah, there were some things, like you couldn’t have more than three enemies on the screen at once, so we had to make sure that that’s how it stayed in our game. In the part with the dragon with the flame, [there should be] flickering, and whatnot.

Source: Gameasutra