The Pixels Of Joxon

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The head has a lot of readability issues. The shaded skin blends too much with the hair's basic colour, so it's hard to tell when one starts and the other ends. It would help a lot if you used the dark hair shade to separate the two. The area around the ear is also messy and hard to make out. The mask also blends with the skin; the highlight you added is lost because it merges with the skin, you'd have to move it away from the skin. Here's an edit to show off what I mean:

This is the Ganon colour scheme I use in Smash, so I'll be paying more attention to this one. I wasn't sure if it was better/worse than the regular one, though. But here's a (mostly) flat Sprite:

I left some shades since they were important to define certain parts.

The raised forearm definitely looks too long compared to the rest of the sprite, you'd have to raise the rest of the arm into an L shape (instead of a V shape) to keep the fist where it is. The legs seem short, the raised leg for example is barely noticeable. The calf should be lengthened so that the knee is more prominent.

The colour palette is really dark overall. If the red was brighter it would help a lot with the readability.