The Cats In General
- Made of Iron: This being a slapstick show, after all.
- The Noseless: Despite being cats, they don't have any noses.
- Pet Heir: Mrs. Cramdilly presumably never had kids and whatever happened to the rest of her family is unknown, so her money went to the cats.
- Trademark Favorite Food: Root beer.
- Rich Idiot with No Day Job: Not that it's really their fault... they're cats, after all. ...anthropomorphic cats, however, so yes, maybe they could have jobs. One wonders if their hereditary money will ever run out...
- Rich in Dollars, Poor in Sense: "When it comes to brains, they're a little bit thick!"
Voiced by: Wayne Knight
- Adaptational Jerkass: He wasn't as assholish in the original comic as he is in the show. See Character Exaggeration.
- Adaptation Name Change: He was named Mr. Black in Gear.
- Anti-Role Model: Blik's not someone who should be looked up to or imitated.
- Asshole Victim: Blik is always on the receiving end of something bad or humiliating, and suffers the most slapstick out of the three, but needless to say, he deserves it for being such an ill-tempered Jerkass.
- Big Brother Bully: He's prone to insulting, hitting, and bossing around Gordon and Waffle a lot.
- Butt-Monkey / The Chew Toy: While all three of the cats are subjected to slapstick, he's arguably put through hell the most and is the butt of the most jokes and misfortunes. Not to mention, the slapstick he endures is much more extreme than what Gordon and Waffle get.
- Catchphrase: "Yeah!", "Sucker!", "I'm drivin'!" and "For I, and my ginormous brain..."
- Cats Are Mean: In Blik's case, at least.
- Character Exaggeration: In the original comic, Mr. Blik (then Mr. Black) was - at the absolute worst - somewhat impatient and sarcastic. In fact, he was the Only Sane Man out of the entire cast of Gear. The show turned him into a selfish, hot-headed, greedy, arrogant jerk. See Adaptational Jerkass.
- Genius Ditz: He's an idiot, yet is somehow able to build a working robot replica of himself.
- Hair-Trigger Temper: He's very bad-tempered.
- It's All About Me: He's quite selfish and self-centered.
- Jerkass: He's rude and hostile toward just about everyone he comes into contact with, has a horrible temper, yells a lot, and is pretty narcissistic, arrogant, and selfish. He's also pretty mean to Gordon and Waffle, often pushing them around and insulting them.
- Jerk with a Heart of Gold: He has some goodness in him despite his Jerkass tendencies.
- Large Ham: Being voiced by Wayne Knight, he loves hamming it up.
- Little Big Brother: The smallest one of the brothers despite the oldest.
- The Napoleon: He's a pint-sized curmudgeon (though, the height part is justified as he's a cat).
- Narcissist: He's very vain, self-centered, and selfish.
- Never My Fault: This guy will not own up to his own faults.
- Nice Hat: The "important hat" from "Bringing Down the Mouse".
- No Indoor Voice: To say he yells a lot would be the Understatement of the millennium. See Large Ham above.
- Parental Substitute: To Mitchell in "A Wooly Adventure".
- Pride: He's very arrogant and egotistical.
- Small Name, Big Ego: He has a comically overly high opinion of himself.
- Unsympathetic Comedy Protagonist: For one of the main characters, he sure is a surly, selfish, narcissistic jerk.
Voiced by: Rob Paulsen
- Big Little Brother: Younger than Mr. Blik, but taller.
- Cannot Spit It Out: When it comes to Kimberly.
- Catchphrase: "Great Gopher!", "Aye!", "In the name of the Highland Quid Clan", "Cheer!" and "Foul creature..."
- Composite Character: Arguably for the Gear version of his character and for Simon (a fourth cat who was not carried over to the show); he has the personality and coloring of the former but the eating habits and physique of the latter.
- Early Installment Weirdness / Early Installment Character-Design Difference: In early episodes, his size varied often and his eyes were a different color.
- Funny Foreigner: Subverted; he's not actually Scottish, he just acts like he is.
- Little Big Brother: To Waffle.
- Only Sane Man: Of his brothers. While Waffle goofs around and Mr. Blik bullies, he is usually serious and rational.
- Team Chef: He cooks a lot. Typically some manner of appalling Foreign Queasine.
- Unexplained Accent: Has a Scottish accent, despite both his brothers having American accents.
Voiced by: Kevin McDonald
- Adorkable: Waffle is a complete and utter goofball but still manages to be absolutely precious and charming in his own way.
- Affably Evil: When he starts acting evil because Blik told him he was in "EVIL!", he's still rather amiable.
- The Baby of the Bunch: The youngest of the cat brothers.
- Berserk Button: Waffle is very vocal about his dislike of liars. While normally goofy and laid-back, he will often lash out whenever he's lied to. Usually, it's directed towards Mr. Blik. He also hates cheaters.
- Big Little Brother: The biggest of the brothers and the youngest.
- Catchphrase: "Splee!", "Woohoo!", "And Waffle!", and "Liar!"
- Cloudcuckoolander: Considering he one time ate a meal of nothing but salt and thinks unicorns lay eggs, he qualifies.
- Crouching Moron, Hidden Badass: When Waffle has to drive Gear in a race against the Chumpy Chump Boys due to height regulations, he's at first completely useless. Then, his pet newt Gomez ends up on the Chumpy Chumps car. He then becomes a ridiculously good Drives Like Crazy driver, who can even steer with his tail. He also has been shown to put up a decent fight against his brothers when angry. When he was tricked into thinking they were mice he beat them to the point of making them run for their lives, and he attacked Mr. Blik for stealing the title of "King of All Root Beer" from him by cheating and was shown to dominate most of their fight.
- The Ditz: The dumbest of the brothers.
- Friend to All Living Things: He's able to make friends with all sorts of animals except for bees and bears, it appears.
- Genius Ditz: Waffle is much smarter than he seems. Every so often, he'll define a rarely heard word like a dictionary and can be surprisingly quick on his feet when it comes to plans. He also builds a working robot replica of himself in "Mecha-Kitties".
- Idiot Hero: He has his heroic moments, like in "Bringing Down the Mouse".
- Kindhearted Simpleton: He may be The Ditz, but he's still nice and good-natured.
- Manchild: He's an adult in cat years, but has the mindset and behavior of a toddler.
- Roaring Rampage of Revenge: After Mr.Blik cheats to win the title "King of All Root Beer" and the benefits that come with it, Waffle goes ballistic and attacks him during the parade being held for Blik. He and Mr. Blik get into a fight, and for the most part Waffle was winning until Gordon tried to break them up.
- Sesquipedalian Loquaciousness: A rare example of The Ditz having a case of this. A minor running gag in the show is him casually dropping a rarely heard word and then giving a near perfect dictionary definition when his brothers express inevitable confusion.
Voiced by: Maurice LaMarche
- Deadpan Snarker / Servile Snarker: Especially to Mr. Blik, though it's hard to blame him.
- Dreadful Musician: On the tuba.
- Perpetual Frowner: He almost always frowns; though, he has smiled at times.
- Not So Above It All: Hovis normally acts reasonable and clever enough, but he tends to make snarky comments whenever he finds a way to throw jabs at Mr. Blik, such as joining the fun of calling him "Mr. Pickles" when his fur turned green.
Voiced by: Liliana Mumy
- All Girls Like Ponies: As long as they're unicorns, that is.
- Cheerful Child: A child, and an optimist at that.
- Distressed Damsel: In Unicorn Club and Core-Uption.
- Friend to All Living Things: Bears notwithstanding.
- In Unicorn Club where she becomes (justifiably) angry at Gordon and even yells at him but then immediately reverts back to her cheerful self.
- In Slumber Party, she shifts back-and-forth between being exasperated with/hostile toward the cats for crashing her party and being caught up in having fun at said party.
- Nice Girl: Kind, forgiving, and looks out for the well-being of others.
Voiced by: Hynden Walch