I think another big reason why I love Zim and Skoodge together, besides their personalities, is their designs... they work so well together. Zim looks so skinny- Shaggy levels of twig-skinny next to Skoodge, who has skinny limbs but he’s so chubby. Also, Skoodge has a relatively simple design- a rectangle with limbs usually, while Zim has a lot more angles and curves. Their body types contrast a lot, and it works really well when they’re near each other. Other than their personalities, and we all know that opposites attract in that way. They’re really fun to bounce off of each other because they always have a different reaction to something- always two perspectives on one topic and that makes conversation interesting. ALSO....their designs kind of match their personalities, since the chubby character is usually the more docile kind one. I don’t know, it just works oddly well even if it was probably not intended by the designers.