Dib and Gaz have made the most horrifying discovering yet, they're part monster! Prof. Membrane soon sends them to Monster High and they meet Frankie and her friends, suddenly Zim enrolls himself in the school as well to face his nemesis and Tak returns for revenge! Will the monsters, Dib and Gaz stop this evil aliens? Meanwhile, GIR meets Tolarei and annoys her to death!
Crossover - Invader Zim & Monster High - Rated: K+ - English - Humor/Supernatural - Chapters: 9 - Words: 18,015 - Reviews: 6 - Favs: 6 - Follows: 5 - Updated: 1/26 - Published: 10/11/2013 - Zim, Dib, Gaz, Frankie S.