Over the last few decades, Scooby-Doo and the gang have been at the forefront of the war on "Monster who is really a Masked Man" crime. While the members of Mystery Inc. have changed slightly over the years, with the temporary addition of members such as the intolerable Scrappy-Doo and juvenile delinquent Flim-Flam, the gang of Fred, Velma, Daphne, Shaggy and Scooby have been a pillar of cartoon crime fighting.
In their travels, the Mystery Inc. gang has encountered a myriad of fiendish, money hungry, overly dramatic thieves. Of course, they've made quite the long list of friends who've helped them along the way, many of whom were major stars of their day. Unfortunately, for every appearance of a relevant guest star - such as Batman and Robin teaming up with the gang to stop an elaborate collaboration between the Joker, Penguin, and some old counterfeiting Grandmother - you also have a visit by one of the celebrities listed below, whose fame has landed them on "The Doo List".
10. Simple Plan
When producers wanted to get a high profile musical artist to guest star on the new series What's New, Scooby-Doo?, they searched high and low for a popular band that fits in with the show's slightly quirky nature. When that failed, someone who I can only assume was a cousin to one of the band members, decided to cast French-Canadian rockers Simple Plan. (Actually, Simple Plan performed the theme to the TV series)
It's not that Simple Plan is a bad band. It's just, for a show being marketed to children one would think that any musical guest would be someone whom kids might actually know. Had ghosts attempted to kidnap Justin Bieber or Lady Gaga, I could understand the appeal to children. But when poltergeists decide they want to haunt a musical tour bus, they settle on the one owned by Simple Plan, whose drumsticks begin to magically begin drumming all over the seats of the bus. When the band just happens to get into an accident with the Mystery Machine, they, along with Mystery Inc., are forced into overnight cohabitation in a nearby ghost town. The Invisible Madman of course follows, and band and gang team up to discover Zeke Zillion and his band are behind the mayhem, hoping to take the place of Simple Plan at an upcoming concert. Of course, the gang takes down this Zillion and his band of musical miscreants, and Simple Plan goes on stage as planned.
9. Brett Hull
I swear to God, these meddling kids and their mangy dog must have unlimited amounts of money and time. Since the 1970s, I've never seen any of them hold a real job, get any kind of education, or age in the slightest. That being said, when they decide to go to Moscow to watch an invitational hockey tournament, of course the ghosts and goblins follow. But a trip to Mother Russia wouldn't be complete without a guest star showing up to make it all the more interesting. Enter hockey hall-of-famer Brett Hull.
When the Frozen Fiend starts terrorizing the players, the gang springs into action with the help of one of the best hockey players of all time. Could the culprits be the American Super Fans, desperate for America to bring home the jewel-encrusted Emperor's Cup? How about Nicolai, whose family's diamonds adorned the cup? The villain was of course typical: a petty cat burglar, out to find copious amounts of new best friends. Hull put up his ice skates and thankfully his magnifying glass, ending his hockey and sleuth careers both in 2005. To be fair, other athletes, such as Olympian Chris Kluge had guest spots on What's New, Scooby Doo?, though Hull's place on this list is secured by the fact that he is easily the most famous and prosperous of the sports stars to cameo on the 21st century follow-up.
8. The Harlem Globetrotters
Generally speaking, the Harlem Globetrotters didn't have any real adversaries. Their record against rivals the Washington Generals was dominant at best, but when faced with ghosts and goblins, even they need help, in the form of Scooby and the Gang.
The teenage gumshoes and the slick-handed basketball team crossed paths not once, but three times over the course of two season, fighting pirates, sea monsters and even an evil basketball team. One wouldn't think that a basketball team would be crime-fighting material, but the Globetrotters hold the record for most guest appearances with the perpetually hungry Great Dane, topping such other guests as the Addams Family and Batman. No matter what the odds, the team of Mystery Inc. and the Globetrotters seems to always be able to thwart evil, or at least money hungry bad guys in rubber suits.
7. Don Knotts
Between the time when he patrolled the streets of Mayberry, and the rise of Three's Company, there lived an age undreamed of, and unto this, Don Knotts, destined to wear the jeweled crown of the Apple Dumpling Gang upon a troubled and bug-eyed brow. Conan reference aside, Don Knotts wore a great many hats in his career. After playing Barney Fife, he went on to star as the Incredible Mr. Limpet, repaired Herbie in Monte Carlo, and played the unforgettable Mr. Furley. But in the mid seventies, he also made a pair of appearances alongside our favorite Great Dane.
Apparently taking a break from Hollywood, Knotts took up the mantle of gumshoe in "Guess Who's Knott Coming to Dinner," playing detective Homer Pipsqueak, out to find the missing Captain Moody. Obvious to the viewing audience and Scooby-Doo, Pipsqueak is simply an alias for Knotts, which manages to fool everyone except for the dog, who is ignored when trying to point it out.
Only four episodes later, Don Knotts returns, this time serving the public trust, protecting the innocent, and upholding the law as a sworn officer of the Juneberry police department. Apparently Fred has a bit of a lead foot, as he's quickly apprehended for speeding by Officer Don Knotts. When the Gang decides to spend the night in town, they discover that Knotts has a lot more to worry about than speeders, as the entire town looks as if Walter Peck just shutdown the Ghostbusters containment system. Juneberry is now Spook Central. Thankfully, the otherworldly apparitions have a more earthbound explanation: Gene Haultrey wants to scare off the townspeople in order to rustle cattle. Rustle Cattle?!?! This seems like a lot of work for stolen beef, but apparently it was worth it in the seventies. Thankfully, the gang and Knotts are able to apprehend the hamburger hustler, and peace once again befalls the town of Juneberry.
6. Sandy Duncan
Thespian extraordinaire Sandy Duncan has been at the heart of stage and screen productions big and small, from playing the titular Peter Pan in the 1979 Broadway revival, to numerous Disney films such as The Cat from Outer Space, even hopping around with the bane of all parents everywhere, Barney the Dinosaur. She's been the lead on sitcoms, guest stared on The Muppet Show and performed comedy with Dick Van Dyke. Of course, what career would be complete without a guest shot on Scooby Doo?
Scooby and the Gang visit their friend Sandy Duncan (I still don't know how they manage to know all of these famous people) on the set of her remake of Dr. Jekyll and Mr. Hyde, not knowing that it is plagued with accidents, mishaps and monsters. Scooby, in a fit of inter-species romance, falls madly in love with Sandy and they begin to seek out answers to the issues on set. Not long after, the gang encounters a myriad of movie monsters, ghouls, ghosts and goblins, before eventually getting arrested. If that weren't enough, in a strange case of mistaken identity, Daphne is kidnapped by "Mr. Hyde" in place of Sandy Duncan.
When it is all said and done, Duncan and what's left of the gang tracks down Hyde, who when unmasked is revealed to be missing actor Zalia Fairchild. Duncan, feeling a soft spot for the failed actor, drops all charges against him when he is arrested, even going so far as to thank him for the publicity he provided to the movie set. Scooby and the gang set off for greener pastures, with the titular Great Dane's love for the thespian left unrequited, thus preventing any awkward scenes of interspecies erotica.