I think this is actually a personification/cosplay of Cubone, not Marowack. The "skull" has no lower jaw and the bone being held tapers whereas Marowaks doesn't

The artist has done others... unless the internet itself missed it big time, I'm pretty sure it's been confirmed somewhere that it's Marowack

I wonder if she'll grab my bone the way she's grabbing hers... Look at the force he's exerting... The floor below is cracking.

Kipperz said:
I wonder if she'll grab my bone the way she's grabbing hers... Look at the force he's exerting... The floor below is cracking.

so....your saying u want your dick torn off??

This is quite clearly cubone. Marowak's helmet isnt shaped like that and of course, cubone's is

This artist's work gives me a cuboner

You guys need to go check Cubone and Marowak again. Cubone has larger eyeholes and a more rounded front, Marowak has a tapered 'sharper' front and eyes similar to this one. The bone tapering could be how its being held as a few of the official sprites seem to 'taper' from the front.

Plus the artist has stated its a Marowak. Changing it back