Defeating Kaiser Sigma with the Z-Saber in Mega Man X3

I took this video was taken from a Nintendo Switch on MegaMan X Legacy Collection while playing MegaMan X3. I'm uploading this because I could not find a video showing that it was even possible to beat Kaiser Sigma with the Z-Saber. While this video doesn't show it, I believe you can also hit him from behind, though I just found it easier to attack from the front. This is certainly the least painful way to go about beating Kaiser Sigma if you are having troubles getting past the the next phase where Virus Sigma knocks you down into a fiery pit (happened to me about 8-9 times). If your wall jumping skills are anything like mine, you'll be doing this a lot. Hope this helps!