When The kids are trapped in the Living Nightmares They must band together to escape their own lives from their horrible Monsters.

Protagonists:

Coraline Jones
Norman Babcock
Wybie
Aggie
Alvin
Neil Downe
Eggs
Kubo
Lillie
Raz
Dipper Pines
Mabel Pines
Mono / Thin Man
Six / The Lady
Seven / The Runaway Kid
Five / Raincoat Girl
Pretender
Nomes

Antagonists:

Jason Voorhees / The Hunter
The Teacher
The Bullies
The Patients
The Doctor
The Viewers
The Janitor
The Twin Chefs
The Guests
Thin Man (Mono's Future Self) (Later became Protagonist / Anti-Villain)
The Lady (Six's Future Self) (Later became Protagonist / Anti-Villain)