Overview
Scooby-Doo! and the Reluctant Werewolf is a 1988 animated comedy horror made-for-television film produced by Hanna-Barbera for syndication as part of the Hanna-Barbera Superstars 10 series. It marked Scrappy-Doo's last appearance as a protagonist in the Scooby-Doo franchise to date; he would not appear in a Scooby-Doo production again until the live-action Scooby-Doo film in 2002. It is also the last appearance of Shaggy's outfit from The 13 Ghosts of Scooby-Doo until Scooby-Doo and the Cyber Chase.
Plot
Every year, all of the classic Hollywood monsters (consisting of Frankenstein's monster, his wife Repulsa, a Mummy, the Witch Sisters, Bone Jangles the Skeleton, Dr. Jackyll/Mr. Snyde, Swamp Thing, and Dragonfly) gather at Count Dracula's castle in Transylvania for the "Monster Road Rally", a road race similar to Wacky Races, awarding the winner with the "Monster of the Year" award as well as many other macabre prizes as announced by Dracula's wife and co-host, Vanna Pira. However, this year, Dracula receives a postcard from the Wolfman stating that he has retired to Florida and thus will not be participating in any further races.
Dracula fears he will have to cancel the race due to this sudden absence, until his lion-like manservant Wolfgang notifies him of a way to create a new werewolf: according to an old spellbook, the full moon will come into the perfect position to transform a human into a werewolf every five centuries, on three nights in a row that begin the following night. The one in line to become the next werewolf is revealed to be none other than Shaggy Rogers, whom coincidentally has won a recent car race with the help of his pit crew, Scooby-Doo, and his young nephew Scrappy-Doo.
From Wikipedia (CC BY-SA 4.0).