So you want a non-humanoid character, huh? Then here, have that monstruous toad-leech-idontknowwhatelse thing... coming with its fashionable ring, lantern tatoo, slime and blisters, enjoy!
(ref for the mouth slobber from the frog enemy in Romacing Saga 3)
The palette is 17 colours (+ bg color + transpa) but I got 20 colours at the end, might have messed up somewhere. Whatever, it fits the rules of the weekly challenge anyway.
Et bon appétit bien sûr ~