Well he can only eat comida that has maíz starch I think but for now Zim can only eat gofres but later he might get sick.But he might not if they aren't made por Gir.Who knows what he put in them.
ZIM HATES ALL EARTH comida THEY CAUSE HIM PAIN!!! for example beans make him ooze green slime and make his head all big, water(i think that counts as a food) feels like acid to irken people, BUT HE LIKES gofres TO SOME EXTENT