Mega you have really outdone yourself just wow 😁

i thought this was just a animation but i got something better! hats off to you 😁

It is very nicely done, though you have several confusing problems:

Stand and Combat pose: The blinking pixel between the back of the head and the neck is disturbing. You should fill it with a color.

Protection: he should protect instead of showing his gun like the charge animation

Attack animations: make him fire during those animations doesn't work, because he's not firing anything in the game

Introduction: Be careful with the position of your sprite inside the sprite sheet, so he doesn't teleport one meter away from the center.

Winner: Remove the pixel that makes the eye blink.

Small poses: his eyes are too big compared to the size of the skull, this leads to problems with the horns too.