Laff-A-Lympics cast:

Yogi Yahooeys:
Yogi Bear-Bert Raccoon (The Raccoons)
Cindy Bear-Lisa Raccoon (The Raccoons)
Boo-Boo-The Get Along Gang (The Get Along Gang)
Augie Doggie and Doggie Daddy-Buttons and Rusty (Chuckle Wood)
Snooper and Blabber-The Chipmunks and The Chipettes (Alvin and The Chipmunks)
Wally Gator-Hopper and The Dynamics (Basketball Fever)
Hokey Wolf-Chanticlear (Rock-A-Doodle)
Huck Hound-Charlie Braker and Itchy Itchaform (All Dogs Go To Heaven movie series)
Quick Draw Mcdraw-Alf (Alf the animated series and Alf Tales)
Yakky Doodle-Little Foot,Cera,Ducky,Peetree,and Spike (Land Before Time movie series)
Pixie and Dixie-Rhonda,Missie,Tuggy,and Moose (You Can Choose! series)
Mr.Jinx-Garfield (Garfield And Friends)
Grape Ape-Ella Acapella (Sharon,Lois,and Bram Show)
Extras-Denver (Denver The Last Dinosaur),Teddy Ruxpin (The Adventures Of Teddy Ruxpin),The Bluffers (The Bluffers),The Star Kids (Adventures of the Star Kids),The Street Frogs (The Comic Strip),Rex,Elsa,Woog,and Dweeb (We're Back A Dinosaur Story),Care Bears and Care Bears Cousins (Care Bears),Bert Worm and Crystal Crawler (The Mirthworms specials),Lollipop Dragon (Lollipop Dragon specials),Ted E Bear and Patty Bear (Ted E Bear specials), Pinky,Panky,Murfel,Chatta,Rocko,Punkin,and Annie (Pink Panther and Sons),and Chuck E. Cheese,Helen Henny,Jaspter T. Jowls,and Mr.Munch (Chuck E. Cheese)

Scooby Doobies:
Scooby Doo-Bucky O'Hare,Jenny,Deadeye,Bruiser,Blinky,and Willy DuWitt (Bucky O'Hare)
Shaggy-Tai,Sora,Matt,Izzy,Mimi,TK,Joe,Kari and their Digimon (Digimon Season 1 and Season 2)
Scooby Dum-Batfink and Karate (Batfink)
Tinker and Speed Buggy-Kidd Video,Carla,Whiz,and Ash (Kidd Video)
Blue Falcon and Dynomutt-Leo,Mikey,Donny,and Raph (TMNT 80's series)
Captain Caveman-American Rabbit (The Adventures Of The American Rabbit)
The Teen Angels-Captain Planet and The Planeteers (Captain Planet and The Planeteers)
Babu-Cornelius,Max,Angus,Chester,and Cliff (Stone Protectors)
Hong Kong Phooney-The T-Rexes (Adventures Of T-Rex)
Extra-Toxie,Nozone,Major Disaster,Headbanger,and Junkyard (Toxic Crusaders),COPS (COPS),Bots Master (Bots Master),Super Ted and Spotty (Superted),Banana Man and Crow (Banana Man),Danger Mouse and Penfold (Danger Mouse),Peter,Ray,Egon,Winston (Real Ghostbusters),Jake,Eddie,Tracy,and Futura (Filmation Ghostbusters),Jet Headstrong,Miss Megawatt,Buzzsaw Girl,Toolbox,Radium Dog,and Monkey Kid (Defenders Of Dynatron City special),Carey Mahoney,Larvell Jones,Sweetchuck,Zed,Moses Hightower,Laverne Hooks,House,Eugene Tackleberry,Debbie Callahan (Poilce Academy animated series),Christine Anderson and Johnny Ledgend (Fairy Tale Police Dept.),The Invisble Man,Frankenstein,The Werewolf,and The Mummy (Monsters In My Pocket),Voltron (Voltron),Inspector Gadget (Inpspector Gadget),Mario and Luigi (Mario Bros Super Show),Napo,Archie,Nelson,Kevin,and Junior (Kangoos),Flash Gordon,The Phantom,Mandrake,Lothar,Rick Gordon,Jedda Walker,Kshin,and LJ (Defenders Of The Earth),and Spiderman,Iceman,and Firestar (Spiderman And His Amazing Friends)

Really Rottens:
Mubbley-Smart Guy,Greasy,Psycho,Wheezy,Stupid,Flasher,and Slimy (Who Frammed Roger Rabbit) (Flasher and Silmy were Toon Patrol members that never made in the film)
Dread Baron-Medeva,Dr.Belljar,Jacquline Hyde,Baron Wasteland,and Sir Vile (Where In Time Is Carmen Sandiego game show)
Orful Octopus-Unibouzu,D.W. Cycloptopuss III,Call-Me-Kevin,Vegetius,and Giii the Space Pirate (Kaiju Big Battel)
The Dalton Brothers-Cousin Grimm,Pierce McCrack,Beni Trauma,and Potato Kahn (Celebrity Deathmatch Season 3 and 4)
Daisy Mayhem-???
Sooey Pig-???
The Great Fondoo-???
Magic Rabbit-???
The Creeplies-???
Extras-???

Co-stars:
Sngalepuss and Mildew Wolf-Henery Turtle,Barbar Wabblers,Keen Hecksore,Brenda Springers,Rod Turkell,and Mele McBiscuit,Cora Lee Perrier,and Mark Spritz (Animalympics) (Cora and Mark with appear in certain episodes replacing Barbara,Keen,Brenda,and/or Rod in certain episodes)
Laff-A-Lympics Anouncer-a comissioner character