Aside from doubling the length of each episode, The New Scooby-Doo Movies differed from its predecessor in the addition of a rotating special guest star slot; each episode featured real-life celebrities or well known fictional characters joining the Mystery, Inc. gang in solving the mystery of the week. Some episodes, in particular the episodes guest-starring the characters from The Addams Family, Batman, and Jeannie, deviated from the established Scooby-Doo format of presenting criminals masquerading as supernatural beings by introducing real ghosts, witches, monsters, and other such characters into the plots.
The Ghastly Ghost Town
The Dynamic Scooby-Doo Affair
Wednesday is Missing
The Frickert Fracas
Guess Who's Knott Coming to Dinner
A Good Medium Is Rare
Sandy Duncan's Jekyll and Hyde
The Secret of Shark Island
The Spooky Fog
The Ghost of Bigfoot
The Ghost of The Red Baron
The Ghostly Creep from the Deep
The Haunted Horseman of Hagglethorn Hall
The Phantom of the Country Music Hall
The Caped Crusader Caper
The Loch Ness Mess
Kapitan Sowa na tropie
Oh No! Here Comes Trouble
My Romance From Far Away
Lay Luntaya
Storm Eye
Inference Notes
The Other Me
Ultraman
Reunion
Makari
South Park
Miss Night and Day
Jumanji
Cold Case
The Scale of Desire
ONI: Thunder God's Tale
Light of Dawn
Being a Hero
Defending Jacob
The Plough Department of Song Dynasty