The Revenge of Mit's Sprites

[Mit]

Wario and Waluigi's teeth would could use either an outline to separate them from the skin more or an overall skintone darkening. Otherwise, they're tough to make out (at 1x anyways).
Wario could probably also use an outline where his glove meets his arm (just the darker yellow shade though); it might not be quite in style with the others, but it'd really help his hands stand out.

how's this?

EDIT: also can someone help me out on this?

it's based off of this design