1 Work in Pre-Invader Zim: Enter the Florpus
Self-appointed Irken Biologist Kwee is well-aware of the nature of the continuously destructive Irken race. Sure enough, at the beginning of Operation Impending Doom Two, he knows what to expect - some alien races will be subjected to enslavement or, more concerningly, extinction.
The lone defective has provided himself with a quest in the name of science: gathering subjects from races to a planetary sanctuary for study and preservation.
Rule number one has always been "Trust no one." However, he finds this rule tested as he finally reaches the planet at the bottom of the list, a mystery planet known only as Earth, and finds himself face to face with his former co-drone and fellow defective, Zim.