Cameo

Huckleberry Hound (1958)

• Back on Shaq, is back human and dog basketball stadium good luck charm, from Johnny Bravo
• Huck makes a cameo in '"Hector, King of the Britons", an episode of Evil Con Carne.
• Huck got hit by Hoss Delgado's truck, an episode of The Grim Adventures of Billy and Mandy.

Quick Draw McGraw (1959)

• Quick Draw McGraw and Baba Looey appear on the train, from Samurai Jack
• One episode of Yogi's Space Race features a cameo by Quick Draw McGraw.
• "I Am My Lifetime", cameo appearance, Quick Draw McGraw is old, from I Am Weasel

The Flintstones (1960)

• "Action Beard", Fred Flintstone is eyeglassed cool, from Dexter's Laboratory
• "Dad is Disturbed", Betty Rubble and Barney Rubble, from Dexter's Laboratory
• "Hot Air Buffoon", Fred Flintstone and Barney Rubble as Thug from The Powerpuff Girls
• "The Big Sleep", Silent Great Gazoo, from Fantastic Max
• "I Am My Lifetime", Betty Rubble as old women, with Pebbles Flintstone and Bamm-Bamm Rubble, from I Am Weasel
• Fred Flintstone is featured strongly in "Modern Primitives", an episode of The Grim Adventures of Billy & Mandy. Barney Rubble and Betty Rubble appear during the end credits.

Yogi Bear (1961)

• "Shotgun Wedding", Yogi is bear of the world, from The Powerpuff Girls
• "I Am My Lifetime", Boo Boo is old cartoon all star Retirement, I Am Weasel
• Yogi Bear and Boo Boo disturb Billy in "Here Thar Be Dwarves", an episode of The Grim Adventures of Billy and Mandy
• Yogi Bear and Boo Boo get hit by Hoss Delgado's truck in "Irwin Gets a Clue", an episode of The Grim Adventures of Billy and Mandy
• Boo Boo animatronic chubby cheese, from Dexter's Laboratory
• "Field Trip", Yogi and Boo Boo, disguise are forest more, from My Gym Partner's a Monkey

Snagglepuss (1961)

• Snagglepuss appears in "Hector, King of the Britons", an episode of Evil Con Carne.

The Jetsons (1962)

• "Action Beard", George Jetson is eyeglassed cool, from Dexter's Laboratory
• "The Big Sleep", Silent George Jetson, from Fantastic Max
• Episodes, George Jetson visits Townsville, from The Powerpuff Girls

Wally Gator (1963)

• "Knock It Off", giant alligator is helping, from The Powerpuff Girls

Magilla Gorilla (1964)

• Magilla Gorilla is mentioned (as "Flying Magilla") in The Grim Adventures of Billy & Mandy episode "Giant Billy and Mandy All-Out Attack"

Jonny Quest (1964)

• "I Am My Lifetime", Jonny Quest as old man, from I Am Weasel

Secret Squirrel (1965)

• Secret Squirrel is nearly run over by Hoss Delgado's truck in "Irwin Gets a Clue", an episode of The Grim Adventures of Billy & Mandy.

Scooby-Doo (1969)

• Scooby-Doo and his friends cross over to the "Bravo Dooby-Doo" episode of Johnny Bravo.
• In the Dexter's Laboratory short "Dexter's Lab: A Story", Dexter offers his dog a Scooby snack.
• The Grim Adventures of Billy & Mandy episode "Reap Walking" features a cameo by the five principal members of the Mystery Inc. gang
• "Keeper of the Reaper", an episode of The Grim Adventures of Billy & Mandy, features a cameo by Scooby-Doo

Grape Ape (1975)

• In "Giant Billy and Mandy All-Out Attack", an episode of The Grim Adventures of Billy and Mandy, Grape Ape can be seen with his head stuffed into a volcano following a giant monster battle