In Mega Man X3, you will find yourself finally using Zero's coveted sword. The author speeds through the game very rapidly, and uses the sword to beat the 8 bosses very quickly the second time around.

Though this run is done very quickly indeed, there are some minor stylistic improvements that could be made such as boss optimization, higher accuracy, and unnecessary damage being avoided.

The page "Mega Man X Tricks" explains some of the tricks that are and/or can be used in the X series games.