Here the characters in the Bump in the night series that are monsters they live in different parts of the house that The Boy and his family are unaware of. The monsters come out at night when humans aren't around. Some of them are kind to other monsters (expect The Closet Monster) like for example like Mr. Bumpy and Squishington being friends.
They also live in different places of the house like for example Bumpy lives under the bed of The Boy and Squishington lives in the toilet tank and The Closet Monster well obliviously lives in the closet of The Boy's room.