Up Canceling Slides

That's it. Up canceling slides. In addition to the expected methods of slide canceling (back canceling and jumping out of slides), you can cancel slides with the up button.

There are a few places this is useful throughout the run, though it is also almost required to reach some of the awkwardly placed E-Tanks in stages (such as the end of Mercury's stage, where there are slides under interestingly spaced spikes).

This also works in Mega Man III and Mega Man IV.