Shipper on Deck: Subverted; although he actively works as matchmaker for Roger and Anita, he doesn't specifically ship them, he just wants Roger to end up with somebody.
Missis/Perdita
Beta Couple: She and Pongo to their humans. ...Or vice versa.
Composite Character: Missis was Pongo's wife in the books. Perdita was another dog to nurse the puppies. The movies and TV series made them one character (Perdita)
Catch Phrase: "I'm Hungry, mother" in the movies, and "Oh, papa!" and "Are you calling me fat?" in the TV series.
Flanderization: In the books, he was only pudgy and not a big eater. In the movies, he becomes a big eater, and in the TV series, he's pretty much OBSESSED with food.
The Lancer: In the episode "Dog's Best Friend" Lucky calls him his best friend.
Patch
Ascended Extra: In the 2003 direct-to-video sequel of the 1961 animated movie
The Big Guy: In the books and the TV series, where he's more muscular than the other puppies.
Ensemble Darkhorse: Pretty much any merchandise of the film (not counting the live-action movies) has him on it.
What Could Have Been: In the TV series, he was originally going to be one of the main puppies, but was demoted to extra due to Disney's fear of having too many major characters.
What Could Have Been: She was going to appear in the TV series as one of the main pups, along with Lucky, Cadpig, Rolly, Spot, and Patch, but then Disney/Jumbo Pictures thought they'd have too many main characters. Unlike Patch, who became a minor pup, Penny never appeared.
Freckles
The Cameo: He never appeared in the TV series as a minor pup, however he made a very brief cameo in "You Say it's Your Birthday"
Meaningful Name: He has a few spits sprinkled around his nose, like freckles.
Pepper
Viewer Gender Confusion: The only scene where she's addressed by name is in a group scene, leaving some fans to think she was male. However, she is confirmed to be female.
Whizzer
Canon Immigrant: He was introduced in the 1996 live-action movie and was later added to the TV series.
Character Development: He starts out as a cocky, kiss-up to Lt. Pug. In "Lucky All-Star", these traits start to fade. It seems zig-zagged throughout the series, but this is mainly due to the mess-up with the airing order.
Handicapped Badass: He's the most athletic of the pups...and he only has three legs.
Hey, It's That Voice!: In the 1961 film, she was Francis Albacore. In TV series and CD-ROM from 1997, she was Miss Finster, and in the 2000 CD-ROM of 102 Dalmatians, the 102 Dalmatians soundtrack, and the 2003 animated sequel, she was Wanda
Villain Decay: In the TV series, her only goal is to get the Dearly's off the farm because it's her land, which is nothing compared to how she wants to kill the puppies and make them into a fur coat in the other versions of the franchise. This however, seems to be the result of Moral Guardians not wanting a vicious puppy killer on a saturday morning cartoon.