Executive Meddling: The many edits done to episodes that once aired uncut (including the ban on the episode "Leap Frogs.")
Fake Nationality: Carloz Alazraqui is Argentinean note from Argentina, a South American country. The capital is Buenos Aires and it borders Chile to the west and south, Bolivia and Paraguay to the north and Brazil and Uruguay to the northeast. and British, and voices an Australian character.
Tom Kenny also lent his voice to several of the supporting cast of characters, including one of the Chameleon brothers, Really Really Big Man, and Peaches (some of which do sound like Spongebob, like the kid who yelled at Rocko for stealing his gum on the movie theater floor on "Popcorn Pandemonium"). Additionally, he also tends to be the voice behind many of the smaller characters who only make a single appearance in episodes.
Plankton (Doug Lawrence; credited as "Mr. Lawrence" on Rocko's Modern Life) is Filburt.
Series creator Joe Murray lends his voice as Ed's son, Ralph Bighead.
Keep Circulating the Tapes: At least, before Shout! Factory picked up the rights, though if you have an uncut version of "The Good, The Bad, and the Wallaby" somewhere, circulate that to all who don't have the episode, 'cuz the part where Heffer gets sucked by the milking machine is not in the Shout Factory version.
Same goes for the "berry picking" gag in "Hut Sut Raw" and the love motel scene in "Road Rash"; those are absent from the Shout! DVD sets and the Netflix episodes.
That said, the aforementioned "banned" episodes ("Leap Frogs" and "Heff in a Handbasket") are present and accounted for, though, for some reason, the episode where Filbert, Rocko, and Heffer go fishing and the one where Rocko becomes famous after Filbert and Heffer videotape him for an art film aren't on the Netflix queue.
Talking to Himself: Charlie Adler does the voices for both Ed, Bev, and Mr. Dupette (Mr. Bighead's boss at Conglom-O and Rocko's boss when Rocko worked at the large comic book store, Super Lot-O-Comics).
Joe Murray originally intended for Rocko be yellow, but Nickelodeon insisted that he be recolored a beige-ish color in order to appease the wishes of a toymaker that ultimately never produced any Rocko merchandise. The necessitated (further) alteration of the "Trash-O-Madness" pilot. Mrs. Bighead also had blue hair in the original pilot.