Behold the Negative Zone - S1-E12
Trivia: When Blastaar comes through the Negative Zone into the Earth dimension, Thing remarks that Blastaar makes him look like Brian Austin Green. Brian Austin Green was the voice of Human Torch for the first season of this show. (00:11:18)
Trivia: Kingpin is voiced by Michael Clarke Duncan, who also played him in the live-action 2003 "Daredevil" movie.
Fiend is Like Friend Without the 'R' - S1-E4
Trivia: Nergal is the villain introduced in this episode. "Nergal" originally was the name of the Babylonian God of Fire and Guardian of the Underworld. In the Bible, he is one of the demons allied with Satan himself. In the series Nergal is associated with the underworld and fire.
Trivia: When the Nazi General pushes a subordinate out of the blimp, he yells a Wilhelm scream.
Trivia: There are a lot of Greek references. Cerberus, Tartarus, a messengers boots (Hermes reference) and the princesses. Twilight is the Greek word for friend love, or Philia. Cadence is Eros, or romantic love. Celestia is Agape, the love God has for mankind. Well, Celestia is kind of a god. Luna is Storge, love of a mother and child. This works because she has helped Scootaloo and Sweetie Belle in a motherly way. She was a mentor to both of them.
Trivia: One of the girls in Wayne's Missing Children's files is Annie, Clayface's split-off clone from The New Batman Adventures episode "Growing Pains".
Trivia: Even though Paul Lynde was the voice of the Hooded Claw, his name did not appear in the closing credits throughout the series.
Trivia: It's noticeable that the series drops in quality in season 3. This is because ABC hired the consulting firm "Q5" to rework their lineup in an attempt to boost ratings. Unfortunately, Q5 seemed to misunderstand the series, and forced the creative team to unnecessarily change it. Their changes included making Janine a blander character and relegating Winston to just being "the driver." The crew hated the changes, which they felt were often racist and sexist. Some even left out of protest.
Trivia: When a Stormtrooper falls down into the mining pit after being shot by Ezra Bridger's energy slingshot, he yells the Wilhelm scream.
The Big Question / The Big Answer - S3-E11
Trivia: At one point in this episode, Hefer says "please put me down Mr. Crabs." Most of the crew from this show went on to make SpongeBob SquarePants a few years after Rocko ended, which has a character named Mr. Crabs.
Trivia: Mike Judge once received an angry phone message from a fast-talking man. The man seemed to be complaining about "Beavis and Butthead", although he mentioned a "Porky's butthole". His voice later inspired the voice for Boomhauer on "King of the Hill".
Trivia: The song playing on the radio when Rosebud breaks in, 'I'd Take a Bite of the Moon For You,' references the episodes 'Alone Together' and 'Tick Vs. Chairface Chippendale.' The song playing when El Seed breaks into the botanical gardens is a jazzy version of the show's theme song.
Trivia: This series was intended to serve as a "sequel" to the 1995 feature-film, though it was later disregarded by the theatrical sequel "Mortal Kombat: Annihilation."
Batman VS Iron Man (DC VS Marvel) - S4-E10
Trivia: The car that Batman slides over when avoiding Iron Man's blasts is the same car from the mini game in Street Fighter II, where players would beat up the car and tear it apart as fast as possible for more points. (00:04:43)
Trivia: Dio in this episode drinks Cronenberg Whisky, just like in the manga. The fictional brand is most likely a homage to the director David Cronenberg, especially given the bit of 'body horror' appearing in this arc.