I finished rewatching You're Level 100! and caught some more screenshots of K.O being completely unlike himself. I mean, sharp teeth, purple eyes, red eyes occasionally, I don't think those were done by accident, honestly.

Smol, menacing, (possibly) red eyes in the first two images. While his eyelids are only purple in this first image, it still doesn't matter! It's purple! Purple is the bad color! Purple is never good when it comes to K.O! (those who read my previous chapter know why I'm saying this)

While the first one here looks like black eyes, the rest don't. I mean, do they even look like a hero would? I mean,  he doesn't even look like a hero in any of these shots tbh

Purple eyelids, again. This happens too frequently in this part to make me actually think it was an accident or mistake.

Smol, adorable, menacing smile. This wasn't necessary, just something I'd add here for fun xD

No purple eyelids in this shot, but he still has sharp teeth and acting out of character by a ton.

*Le gasp* All those sharp teeth tho!

(I needed to get a screenshot of the first one here, haha xD)

Still sharp teeth, acting unlike himself, until he realizes it was just a glitch. After that, he's back to normal.

But yeah, like I said, I don't think this was a mistake or unintentional. I mean, the shadow K.O from the promo originally made a brief appearance in the episode Face Your Fears as K.O's fear, so anything can actually happen.

This should be the last I talk about this unless I find more pictures like this XD