Bunny Island is where the Evil Con Carne organization is stationed and serves as their main base of operations.
In the Grim and Evil series, Bunny Island was shaped like a light brown bunny head with a wide mouth, but in Evil Con Carne its shape was more detailed, resembling a full bunny with head and body and a darker brown color.
The interior has Ancient Mexican style decor, built with yellow brick. It is so big, that Hector sometimes discovers rooms he didn't realize they had, such as the lounge.
All of the rooms on the island are large, open spaces.