The Gromble
Aaahh! Real Monsters character
Background information
Portrayed by
Portrayed by
Voiced by Gregg Berker
First appearance "The Switching Hour"
Last appearance "Rookie Monsters"
Character information
Full name
Species Dangerous Nessus
Other names
Personality Strict, Angry, Intimidating, Intelligent.
Citizenship The New York Dump
Relatives Mama Gromble, Bomble (son)
Minions Snorch and Zimbo
Enemies Simon the Monster Hunter
Quote "This better be good!"

The Gromble, is the initial main antagonist, later anti-hero of Aaahh!!! Real Monsters. He is the intimidating and strict headmaster of the monster academy, who demonstrates his tough love by belittling his students for poor scares. The Gromble has been seen eating one of his students in one bite (although he spits him out after chewing him up). Gromble calls his shoes "snuggle bears" and loves relaxing in his bed. He is sometimes referred to as "The Gromble", "Gromble Sir" or "Mr. Gromble". Gromble is teacher of almost every monster child shown in the series. He is strict and wants his students to reach their full potential. He seems to favor Oblina, likely because she is the best student.

"Gee, this is harder than I thought."
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