Aaahh!!! Real Monsters

Aaahh!!! Real Monsters is an American animated television series. It was created by Klasky Csupo for Nickelodeon. The series is about three young monsters. They are Ickis, Oblina, and Krumm. They go to a school for monsters under a city dump. At the school, they learn to frighten humans. Many of the episodes deal with them making it to the surface to perform "scares" as class assignments.
The series was first broadcast on October 29, 1994, on Nickelodeon. It had a total of 52 episodes over 4 seasons. The last episode was shown on December 6, 1997.