In Wimp on the Barbie, Rocko says he met Dingo in the 3rd grade and was tortured for 12 years by him, making Rocko at least 20 years old.
In Yarnbenders, Rocko and Heffer spoof such fairy tales as Hansel and Gretal, Jack and the Beanstalk, Cinderella, Pinnochio, and The Wizard of Oz.
Rocko: For the love of cake, HIDE MEEEEE!
Hansel Heffer: Hey, Grandma, those are some big teeth you have.
Filbert's "False" Teeth: All the better to chew up small pint-sized little morsels like you.
Dingo: Please . . . it is only then I can become one with the unicorn.
(The unicorn, in the van, waves and honks)
Filbert: Now, remember; I'm the witch!
Heffer: After studying with super high-tech technology and a box of crayons, we have a made a model of Dingo as he would like today!
(shows Rocko a picture of a scary kangaroo)
Rocko, Heff, and Filbert: And Dingo was his name, Oh!
This is a reference to the song, BINGO, in which the lyrics go, "And Bingo was his name, Oh!"
Filbert: Wait! I was gonna make Espresso!
This is a reference to Gene Hackman in Young Frankenstein (1975) as he played the role of Harold the Bling Hermit.