|Spooky Scary Skeletons|
|Signs of nearing||Shrek's voice|
|Origin||Walt Disney and Carl Stalling's Silly Symphonies series|
|Theme song||Spooky Scary Skeletons|
Spooky Scary Skeletons are the bosses appearing on Slender Fortress.
When night falls at a church cemetery, amidst howling dogs, hooting owls and fighting cats, four skeletons rise from their graves for macabre merriment. Dancing and playing music by using each other as instruments, the skeletons party until the rise of the sun, where they frantically rush back into their graves, forming a skeletal chimera to get back faster.