[matheusmoreira]

> I believe that Mega Man actually employs infinite acceleration, that is, you’re either stopped or on full speed

Yeah, acceleration is essentially infinite.

https://tasvideos.org/GameResources/NES/Rockman/Data

When moving horizontally there's very small lag at the start and then he accelerates to full speed pretty much instantly.

When moving vertically by jumping, his speed is straight up set to some constant. There is downwards deceleration by gravity though, leading to "fall faster" tricks:

https://tasvideos.org/GameResources/NES/Rockman#FallingFaste...