[3] On the show's creator Joe Murray's website[4] and in the episodes "Born to Spawn"[5] and "Uniform Behavior",[6] his name is spelled as Filburt.

[5] Joe Murray, the creator of the show intended for Filburt to be a secondary character used to "add texture" to Rocko and Heffer Wolfe.

Mr. Lawrence, functioning as a director on the show sculpted Filburt into a main character befriending Rocko and Heffer.

[4] Joe auditioned Mr. Lawrence in a large casting call in Los Angeles and chose him as the voice actor for Filburt.

[sic] [8] Martin Olson, a writer described the decision when Nickelodeon gave the "ok" for the marriage of Filburt and Paula Hutchison as one of the most memorable moments of the production.

These include a cashier at a grocery store, cashier at Kind-of-A-Lot-O'-Comics, license checker at the Department o' Motor Vehicles, film runner at the Googleplex Cinemas, lounge singer, Christmas tree salesman, photographer, cook at Stuff on a Stick and a food sample carrier.

In the end of the episode "Sailing the Seven Zzz's" while in a submarine, Filburt is about to say it, but Rocko and Heffer consoled and say "You're nauseous" at which point he says "right" and vomits.

The other running gag is Filburt's constant and improbable run-ins with bad luck and calamity, which explains his neurosis and permanent state of great fear.