The Ghost Hunting Club is an unregistered, and unofficial school club at Royal Woods Elementary School, that was formed by Lincoln and Clyde. The club was first mentioned in "Out of the Picture".
Lincoln thought Clyde was supposed to register the club and vice versa, but none of them registered the club in the end.
So far, Lincoln and Clyde are the only known members of the group.
- It is likely inspired from the TV show, ARGGH!.