Billing Displacement: The discs for the DVD set feature Audrey with the team instead of Monique, even though Audrey was only in a handful of episodes and was never a member of the team.
Fan Nickname: This one's nickname is "Toonzilla." "Junior" is also used, but "Zilla, Jr." when having to differentiate from "Godzilla,Jr."
Keep Circulating the Tapes: For quite some time, the only releases this show had were two DVD releases that only had a few episodes, one in particular covering the "Monster Wars" trilogy, as well two VHS tapes. Netflix later got the rights to stream all 40 episodes (which included two episodes that never aired during its original run), and now to coincide with Godzilla (2014), Mill Creek Entertainment gave the entire show a 4-disc DVD release.
The Sharptooth roar is audible in P.E.M.C., the Armillaria, and the Chameleon.
P.E.M.C.'s high-pitched screech is reused for the Mutant Jellyfish, the Fire Monster, and the Giant Water Beetle.
Skeetera and the Cicada share chirping.
El Gusano, the mutant rats, Bacillus, the Thorny Devil, the Giant Centipede, and the Cicada have modified pig screeches.
The baby Quetzalcoatl's screeches have clearly audible Jurassic Park velociraptor screeches mixed in.
The Ice Borers, Termite Queen, and Giant Manta Ray have elephant roars.
The Giant Bat's screeches are actually elk bugles and dolphin squeaks.
Komodithrax's roar is obviously a modified version of the Jurassic Park T. rex's roar.
Queen Bee's shrieks are some very angry-sounding cats.
Technology Marches On: Here and there. The cell phones used are the old clamshell style with antennae, not to mention the disk that Nick uses to load the program in "Talkin' Trash" resembles a somewhat over-sized 3.5-inch floppy. Animal's professional video camera uses VHS cassette tapes, and Randy was playing a video game console that's pretty much the first PlayStation in "New Family, Part 1" (then again, it was produced by Sony, so it was probably necessary).
Randy and Mendel's palm-sized laptops, on the other hand, somewhat subverts it by having what looks like control pads on the keyboard portion and are much smaller than current laptops/tablets, not to mention probably much more powerful considering the various uses. Some of the equipment used throughout as well - laser-based weapons, the mini-sub, the H.E.A.T. Seeker, etc.
Several kaiju - many of which were loosely based on Toho's - were designed for the show but never appear, with some only making brief cameos in the opening. These include Anguirus, Biollante, Gigan,note Reimagined as a bat-like kaiju with a Lamprey Mouth. Gus the Spider, Manda,note Reimagined as a worm. and Megalon.
Komodithrax was originally going to be a female version of Godzilla, explaining Nick's line where he wonders if she's the same genus as him.