Zim is a member of the alien Irken race. As Zim is severely emotionally unstable, he is considered defective. Zim, on the other hand, believes that he is a mighty warrior. Since his actions usually lead to disaster his leaders, the Almighty Tallest, sent him to Foodcourtia as a sort of exile. While there, however, Zim heard about Operation Impending Doom II, and returned to Conventia in the hopes of getting an assignment. Chagrined, the Almighty Tallest sent him on a "secret mission" to Earth, in order to keep him away from Operation Impending Doom II. After arriving on Earth, he enrolls in the nearest elementary skool to begin his infiltration and becomes quick rivals with Dib, an avid preteen paranormal investigator.
Zim is a bit stupid and crazy as with the rest of the people in the show. Zim raises his voice to make points and thinks every human, not matter whom they are, is nasty, dumb, vile, and needs to be destroyed. However he can never manage to accomplish such.
~IT IS ME! ZIM! I AM ZIM! THE AMAZING FUTURE RULER OF THIS DIRT ROCK! HAAAAAHAHAHAHAHAHAHAHAHAASCJIJVFBUGVCOQHISX
Zim's army of evil
~My idiotic SIR Unit. Need I say more?
~I have NO IDEA WHATSOEVER what Ash is, but it is loyal, and close. A little... TOO close.
~Another one of those love-y slave things.
~This one is ALWAYS asking if I am alright. But I suppose it is nice.
~I don't even know.
~I think this one is a.... "suicune" thing.
~Freakazoid weirdo Skar.
~She talks too much. BLAAAAAAHHH. But I suppose conversations with her kill time.
~Why don't you fall down a cliff for me, hm?
~Always seeking conversations.
~DEAAUGH. HUSVFHHVKCJ SHE YELLS TOO MUCH.
~Needs to stay out of my personal space.
~More minions! More!
~That crazy one that always manages to inflict you with a good laugh.
~STUPID TRAITOR. NRRRRGH.
~That HHHHIDEEOUS TAAAAK'S ANNOYING UNIT.
~Urgh. This filthy repulsive earth baby with his DISGUSTING GREASE FILLED ECLIPSE HEAD.