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Invader Skoodge is an Irken Invader, who is hated by the Almighty Tallest, like Zim. Zim is Skoodge's best friend, although you probably won't be able to tell, as Zim abuses Skoodge a lot.
Invader Skoodge
Skoodge seems to be unaware that Zim's mission is a lie, or Skoodge doesn't want to tell Zim, as Zim goes crazy whenever he gets upset. Skoodge seems to respect Zim, despite him being thrown down a cliff where a Hogulus lay waiting to eat him. Skoodge, like Zim, seems to be unaware that the Almighty Tallest hate him, even though they shot him through a canon into the planet Blorch, home of the man eating rat people. When Skoodge finds out that the Almighty Tallest hate him, he travels to the planet Earth, and lives in Zim's basement. He was to have a much larger role had the series continued, and was to have helped Zim with his schemes.
Zim
Zim sees Skoodge as a pitiful excuse for an Invader, and calls him gullible, and he seems to be aware that the Almighty Tallest hate him. He often abuses Skoodge, and is not very welcoming when he finds him in his basement. He thinks that Skoodge got lucky when he conquered his assigned planet Blorch, despite Skoodge being an excellent Invader. He is Skoodge's best friend, although he doesn't act like it, as he is cruel to Skoodge. He grows a more powerful dislike to him every time he meets him, felling Skoodge is just rubbing the fact in Zim's face that he conqoured his planet before Zim