It looks like when children draw humans, and its all f*cked up.
I used to draw arms coming out of heads because I didn't understand what a body was apparently.
SOME of the USA art isn't awful, but generally still blows compared to the JP ones.
China Warrior was pretty OK. In some ways, it was better than the PCE one since the PCE one is just electro-brucelee standing looking f*ckin jacked.
The Turbo one at least kind of depicts what the game is, and the color choices are actually pretty nice.
but, Ballistix is a good example of what art SHOULD have looked like.
There were plenty of those kinds of artists around back then.
Look at the D&D books from back then. That stuff would have been perfect for Dungeon Explorer.