Hmm...it's hardly ever to know about the truth of their feeling, but anyway if I think that Yuck likes Yin
because I see in 2 episodes that Yuck shows a little of his feeling, in "Falling Yin Love" I see him got shock when Yin pretend to still like him but from Yuck there's one thing that he had the one that Yin wanted is his brown-yellowish eyes and in "Upstanding Yuck" when Yin tries to knock him down he praises her also looked at her with a different face (though when he turns good)and unknown yet about Yin's feeling but I like if they be together, YinXYuck rulezzz!!!