|Residence||of Grim, Cerberus, Fred Fredburger, Earl, the Boogeyman, Velma Green, Creeper, Aunt Sis, Judge Roy Spleen, Jack O'Lantern, and other monsters and dead souls.|
|Real world information|
The Underworld is where Grim became the Grim Reaper. It is the home of most monsters and supernatural creatures.
Many areas in The Underworld follows classical depictions. It is a fiery, nearly barren land of death that is mostly covered with lava. Demons, monsters, and all other evil species reside in the Underworld. However, some areas have a more modern take, and resemble monterous cities.
It appears to currently be very similar to modern countries, having a modern-styled court system, a grade school system, and even various products and companies.
Locations Within The Underworld
- Underworld Court
- Doomsday Junior High
- Big Move Laxatives Building
- A Candy themed area seen in Underfist
- Lower Heck
- It is a homage of Hell, which Satan lives here.