Wily 4 - Stage
Screens 1 and 2
They happen
Screen 3
This is the long screen with platforms on tracks.
It starts with a platform approaching a shaft. You can use the Speed Gear and Rush Jet to catch this first cycle.
Many runners fire Bounce Balls in the vertical shaft because of the 2018 Twitch Rivals event for Mega Man 11. There is no other reason to do this other than it's a lot of fun.
Once the platform reaches the top, you can use Impact to cross the spike pit.