There are numerous intellectual properties within the universe of Pepper Ann that are only ever briefly mentioned. Since they help to create a fully-fleshed-out and lived-in world, though, here are some of them...
101 Mutations[]
An animated series mentioned in the episode "Girl Power," featuring "the madcap adventures of a bunch of radioactive puppies living on the rim of Mount Pinatubo."
No images of the show are ever seen, as it is mentioned by Pepper Ann as being canceled, in favor of the new Tundra Woman cartoon. Pepper Ann laments its end, but Moose refers to it as a "tired, old show" that Tundra Woman is sure to be much better than.
The series is clearly a reference to 101 Dalmatians, specifically 101 Dalmatians: The Series, the animated series that aired on ABC alongside of Pepper Ann. The two shows shared numerous cast and crew members.
Antitrust[]
A board game seen in the episode "The Merry Lives of Pepper Ann." It is inspired by, and very similar to, the real-life game, Monopoly. Whereas Monopoly is concerned primarily with the buying and selling of real estate, however, Antitrust seems to focus on a broader business theme, incorporating product lines and corporate mergers.
Similarly to Monopoly, Antitrust is a notoriously long and involved game. The B-plot of "The Merry Lives Of Pepper Ann" is entirely devoted to Milo, Nicky, Moose, and Crash playing a single game over the course of several days. When they begin, Crash ominously demands that they only play if everyone agrees to complete the game. The others are all horrified, as no one has ever completed a game before, but everyone reluctantly agrees.
Ultimately, the game comes down to a one-on-one battle between Nicky and Milo, where Nicky finally emerges victorious. Their long, hard battle ended, Nicky and Milo immediately begin another game.
Arcade Games[]
Numerous arcade games are seen and mentioned in various episodes. For a more-or-less complete list, check out the entry on Brain Dead.
The two most well-documented games, however, would have to be Crunch Pod and Cowz! While the actual rules of both are unclear, gameplay footage of each of them does appear in a number of episodes. They both seem to be old-school arcade games, most likely in the same vein as Pac-Man and Asteroids, with high scores being of paramount importance. They both also seem to have similar mechanics to each other, although with very different graphics and theming.
Crunch Pod has a single-player mode and, while the cabinet can not accomodate two players, it appears that multiple cabinets can be linked to allow for two-player competitive gameplay.
Cowz! also has a sequel, Revenge Of Cowz! Presumably, the gameplay is similar, although exactly how similar is unknown.
Contortie[]
A board game of physical skill that appears numerous times throughout the series, with minor variations from episode to episode.
Usually, the game appears to be more or less identical to the real-life game, Twister, featuring a mat with colored spaces on it. Players have to place their hands and feet on different colored spaces, trying not to get entangled and fall.
As in Twister, one player operates a spinner to determine which space the other players need to reach for.
In most appearances, the spaces are all circles, as in Twister, but in the episode "Dear Debby," the Diggety family is seen playing a version where the spaces are several different shapes.
Cuba Libre![]
A video game featured in the episode "G.I. Janie," for the (fictional) home console, the FunStation 8000 ("128 megabytes of hard-hitting, brain-numbing action!"). It is one of the games that Aunt Janie rents in order to do research on video game violence and the effect it has on players.
The game is never actually played in the episode, but Pepper Ann describes the plot as "You're on a CIA suicide mission to overthrow Castro!"
Also rented by Janie at the same time were the games Celebrity Stalker ("It's pretty much self-explanatory"), and Warmonger, which is the game that the characters ended up playing for the rest of the episode and which Janie became obsessive over.
Dusk Dimension[]
A television series (presumably live-action) featured in the episode "Psychic Moose." It is a black-and-white science fiction anthology series that is a direct reference to The Twilight Zone, so is most likely a product of the 1960s.
Pepper Ann is a fan, but is surprised to discover that Moose is as well, when the pair watch a Dusk Dimension marathon together.
The two Dusk Dimension episodes featured are: "the one with the eye transplant," which is most likely a parody of the Twilight Zone episode, "Eye Of The Beholder"; and an episode that is clearly a parody of "Time Enough At Last," where a man crawls out of a basement after a nuclear holocaust and shouts to the heavens: "Now I can finally write that book. But...who will read it?!"
Kaboomski![]
A board game featured in the episode "The Velvet Room," where it is played multiple times by Pepper Ann and Milo, with Moose joining in or looking on.
The game appears to be very similar to the real-life game Risk, with both players representing different countries, seeking to acquire territory. In Risk, actual geographic regions are used, whereas in the episode, Pepper Ann's country is "Pearsonia" and Milo's is "Milovakia." Since the board is a map of the real world, these may be informal references, rather than a case of the game having players invent their own nations.
When playing Pepper Ann generally defeats Milo (12 consecutive times at the beginning of the episode), but at the end of the episode, Milo finally emerges victorious, when playing against his mother and step-father.
Kung Fu Kari[]
A doll or action figure that appears in the episode "A Kosher Christmas." Moose receives one as a Christmas present and seems to derive quite a bit of enjoyment from it.
The figure appears to be a young girl with red hair and a blue outfit. It's difficult to tell, but the outfit may be a martial arts gi, with a yellow belt. Or...it may just be a dress.
There is presumably some form of automated "kung fu action" to the figure, although we only see Moose holding it in the episode.
It is unknown whether there is any source material for the figure, either a television show or comic book. More likely, it seems to be primarily a toy or part of a line of toys, in a similar vein as Stretch Armstrong.
Macho Mutant[]
Almost nothing is known about Macho Mutant, including what form of media the character comes from. In the episode "Mash Into Me," a poster on the wall in Crash's bedroom features the title and character.
Visually, he (presumably a "he") is a hulking blue humanoid being with yellow eyes and a large mouth.
Going stricly by what we know about Crash, it is possible that Macho Mutant is a comic book character, but this is never explicity stated. It is also unknown whether there is any additional Macho Mutant merchandise, but with a poster, one imagines that there most likely is.
Mighty Ducks[]
While never shown or mentioned by name, in the episode "The Environ-Mentals," Pepper Ann briefly watches an animated series on television that prompts her to exclaim: "They're ducks that play hockey! C'mon! Use your puck gun!"
This is clearly a reference to the Disney animated series, Mighty Ducks, which aired around the same time as Pepper Ann. The show featured the adventures of a team of anthropomorphic ducks from the planet Puckworld, in a parallel dimension. Stranded on Earth, they are in pursuit of their enemies, the Saurians, led by Lord Dragaunus. To keep in shape, they play hockey and form the NHL team, the Mighty Ducks.
What is interesting is that, while 101 Mutations is definitely a reference to 101 Dalmatians, it appears that Mighty Ducks exists in Pepper Ann's world, exactly as it does in ours.
Prairie Patty[]
The origins of the Prairie Patty character are unknown, but she manifests in several episodes as a doll. There is generally also a Blacksmith Bob doll that accompanies her.
Both are first seen in the episode "Psychic Moose," but are named in the episode "Pepper Ann's Day Off-Kilter." In the episode "Girl Power," Moose has an imaginary conversation with her Tundra Woman action figure, wherein Tundra Woman says that she has to go rescue Prairie Patty from the clutches of Ice Thoron.
Prairie Patty does not, however, seem to come from the Tundra Woman universe, and it is unclear if she has any accompanying media, or if she simply represents a line of dolls. The theme would seem to suggest a property along the lines of Little House On The Prairie or American Girl, but...who knows?
Space Gerbils[]
Similar to Macho Mutant, Space Gerbils is only ever seen on the show once, in the context of a poster on the wall in Crash's bedroom in the episode "Mash Into Me."
The poster features an anthropomorphic gerbil character wearing a space suit, standing on the surface of a moon and holding what appears to be a laser gun. Despite the title being plural, only the one gerbil is seen on the poster.
Like Macho Mutant, going by what we know about Crash, Space Gerbils may possibly be characters from a comic book. Again, though, this is never explicitly stated and nothing is known for certain about the property or any possible additional merchandise.
Turbo Cow[]
Once again, just as with Macho Mutant and Space Gerbils, Turbo Cow is only ever seen as a poster on Crash's wall.
The poster features the title and the character, who appears as a silhouette of a cow wearing some sort of sci-fi styled eye gear. The image is a closeup, so it's even unclear if Turbo Cow is anthropomorphic, or just a regular old cow.
Again, nothing more is known about Turbo Cow, or from what form of media the character might originate.