Cat Mario

Cat Mario is a form of Mario introduced in Super Mario 3D World which he can transform into by using a Super Bell. This suit is not limited to Mario, and can also be used by Luigi, Toad, Princess Peach, Rosalina, Toadette in Super Mario Maker 2, and Bowser. Mario's suit is yellow with some faint orange stripes in a few places, while Luigi's is green, Peach's is pink, and Toad's is blue, which match their colors (Luigi's suit, however, has rounded ears, a spotted body, and dark green ears and a tail tip, making him resemble either a leopard, a jaguar, or a cheetah). Rosalina's is black, and resembles a tuxedo cat, while Bowser uses a Super Bell to become Meowser, the final boss of the game. Toadette's suit is a slightly dark pink version of Peach's and also has her pigtails added on. In Mario Kart 8, Cat Peach appears as a playable character of her own in the first DLC add-on pack for the game, and reappears alongside Cat Toad in Mario Kart Tour starting with the Cat Tour.

Super Mario 3D World / Super Mario 3D World + Bowser's Fury
Cat Mario makes its debut in the Wii U game Super Mario 3D World, gained upon collecting a Super Bell. In this form, Mario can briefly climb up or cling to both walls and the Goal Pole. Mario also has the ability to pounce on enemies from midair to slam into them, similar to a dive attack. He can also claw swipe enemies in front of him (which can spin Cat Wheels, similar to Tanooki Mario tail-whipping Tail Wheels in Super Mario 3D Land), as well as slide into them. Cat Mario runs at a crouching height, and he also breaks into a sprint significantly sooner than in any other form. Climbing a Goal Pole as Cat Mario will lead him to meow in addition to his "Yahoo!" cry.

When Bowser becomes Meowser, he has white and orange fur with brown stripes, similarly to a tiger, a ringed tail, cat ears instead of horns, whiskers, and his nose is black. Also, his hair is colored red, white and brown, and his shell appears to become more blueish. Like Cat Goombas and Cat Bullet Bills, his form is similar to a transformation than an actual suit. However, in addition to this form's abilities, he can also tail whip, like Tanooki Mario, and he retains his fire breath.

There is an alternate version of the form that is obtained by grabbing a Lucky Bell, which is the same as normal Cat Mario except that it has a red collar and a bell. During that state, Mario can turn into Lucky Cat Mario, similar to Tanooki Mario's Statue form in Super Mario 3D Land (though the Lucky Cat form is invincible, rather than invulnerable and ignored), and gives bonus coins while falling); its appearance is similar to that of a . If Mario collects a Super Bell while in this form, he "downgrades" to normal Cat Mario, unlike collecting a Super Mushroom while Mario already has a power-up (similar to the Super Leaf and Tanooki Suit/Statue Leaf).

In the game's ending cutscene, the protagonists will always leave the Sprixie Kingdom and return to the Mushroom Kingdom in their Cat forms, even if they did not use them for the final battle against Meowser.

In Super Mario 3D World + Bowser's Fury, scanning the Cat Mario amiibo gives an Invincibility Bell, which turns Mario into White Cat Mario; a white variant of Cat Mario which applies White Tanooki Mario's invincibility to this form. The amiibo only works once per level.

In Bowser's Fury, Mario must use the Giga Bell to become Giga Cat Mario, a larger and more powerful version of this form, to fight Fury Bowser. Most of the enemies and bosses gain Cat forms, but these are only visual changes; the exception being Cat Bullet Bills, which retain their homing behavior from Super Mario 3D World. Additionally, Plessie gains a Cat appearance during the final battle, and stays that way afterwards. Upon collecting all 100 Cat Shines, Bowser Jr. and his Clown Car also gain Cat features, and Mario's Cat form changes to resemble his Giga Cat form.

Super Mario Maker
Cat Mario and Cat Peach are available as a Mystery Mushroom costumes in Super Mario Maker. They are only obtainable after beating Cat Mario's Course and Cat Peach's Course, respectively. Their transformation sound is the Super Bell transformation sound from Super Mario 3D World, and their death tune and course clear themes are the corresponding ones from the same game. Cat Mario's running animation have him running on all four legs, and both costumes' jumping sounds are their corresponding jumping voice clips from Super Mario 3D World. Pressing causes them to pose with their paws in the air, making the "claw swipe" sound from Super Mario 3D World.

Super Mario Odyssey
In Super Mario Odyssey, 8-bit sprites of Cat Mario and Cat Peach's costumes from Super Mario Maker can be seen in various locations throughout the game. When hit using Cappy, Cat Mario sprites drop coins and Cat Peach sprites drop a heart.

Super Mario Maker 2
In Super Mario Maker 2, Mario, Luigi, Toad and Toadette can transform into their Cat forms after collecting a Super Bell in Super Mario 3D World-style levels. As in Super Mario 3D World, they have the ability to claw swipe, climb up walls and Goal Poles, perform a sliding tackle, and pounce while in the air (the last two abilities are performed by pressing, , , or while crouching and in midair, respectively). They can also climb up Semisolid Platforms.

Additionally, knocking on the Warp Door in the Super Mario 3D World style may cause Weird Mario to appear in this form.

Mario Kart 8 / Mario Kart 8 Deluxe
Cat Peach appears as a downloadable character in Mario Kart 8. She is part of the The Legend of Zelda × Mario Kart 8 DLC pack along with Tanooki Mario and Link, as well as four karts and eight race tracks. The Cat Cruiser also has a design that resembles Cat Peach. Cat Peach, along with the female Villager have more acceleration at the cost of their weight stat. They are the lightest middleweight playable characters in the game, being slightly lighter than Peach, Daisy, and the various Yoshis, but heavier than Toad, Koopa Troopa, the various Shy Guys, Lakitu, Toadette, Larry, Lemmy, Wendy, the babies, and Isabelle. Nin★Anne uses Cat Peach as the staff ghost for  SNES Rainbow Road. Similar to Tanooki Mario, Cat Peach has different animations and quotes from her original counterpart, with many of them being meowing noises, or puns (e.g. "Meowtastic!").

Like with every character playable in Mario Kart 8, Cat Peach appears as a playable character in Mario Kart 8 Deluxe for the Nintendo Switch. Unlike the Wii U game, she is included within the base game and is available from the start. She now shares stats with the female Villager and the Inkling Girl, but is still among the lightest middleweight characters.

Mario Kart Tour
Cat Peach returns as a High-End driver in Mario Kart Tour, first appearing in the Cat Tour. The tour also introduced Cat Toad, a new playable character in the Mario Kart series. Both of them have the Super Bell as their special item, which, when used, strike the user's surroundings, similar to the Super Horn.

Puzzle & Dragons: Super Mario Bros. Edition
Cat Mario and Cat Luigi appear as leader characters in Puzzle & Dragons: Super Mario Bros. Edition. Cat Mario is a Dark/Fire attribute member that is unlocked by clearing ★World 3, and Cat Luigi is a Dark/Wood attribute member that is unlocked by clearing ★World 4. Both of these characters can be trained so they reach level 99, and have similar HP, attack, and recover ratings with only a few differences. Cat Mario's main skill is called "Cat Walk", and it can be performed once every 12 turns; it increases by 1.5, for one turn, the attack power of any team member that has the Dark attribute. He also has a leader skill, the "Bell Rhythm", which raises every member's attack power by 3.5 after performing six combos consequently. Meanwhile, Cat Luigi's main skill is "Cat Dash", which lets the player move freely any orb that is on-screen for 10 seconds. His leader skill is "Bell Tempo", and it raises the attack power of all team members by 5.5 after attacking with five elements (attributes) at once.

Super Smash Bros. Ultimate
Cat Peach appears in Super Smash Bros. Ultimate under the name Cat Princess Peach as an Ace-rank, Shield-type, primary spirit with three support slots. The spirit reduces the fighter's weight but also makes them faster. It can be summoned using Rover's and Baby Peach's cores.

Other appearances
The Nintendo 3DS and Wii U's eShop and Play Nintendo offers a video series called The Cat Mario Show which stars both Cat Mario and Cat Peach. The purpose of the series is to provide viewers with facts, strategy tips, quizzes and other content regarding the latest video games released for the Nintendo 3DS and the Wii U.

In the Super Mario Mash-Up Pack in Minecraft, Cat Mario and Cat Peach are playable skins. Leather Armor is replaced by the Cat Suit. Ocelots are replaced by Cat Mario, while normal cats have many skins replaced by Cat Luigi, Cat Peach, Cat Toad, Cat Rosalina, Meowser and Lucky Cat Mario.

Super Mario 3D World

 * Digital instruction manual bio: "Climb walls and claw enemies."
 * North American website bio: "You've never seen Mario like this! Pick up a Super Bell to transform into a cat. Scamper up walls to find secrets, pounce from above, and attack enemies with your claws—while looking pawsitively adorable."

Super Mario Maker 2

 * North American website bio: "You can’t mention Super Mario 3D World without showing some love for Cat Mario. Climbing walls...scratching...sliding, clawing at the air—there’s nothing quite like it."
 * Play Nintendo: "Cat Mario in the house—There are things you can do in the style of Super Mario 3D World that you can’t do in any other style! For instance, you can add the Super Bell item, which turns Mario into Cat Mario. You can also add walls, trees, and semi-solid platforms for Cat Mario to climb. To learn more about Cat Mario’s moves—like Climb wall, Scratch, Slide, and Lunge—you can visit Yamamuro’s Dojo in the game to see a tutorial."

Cat Peach

 * Mario Kart Tour Twitter:
 * "Cat Peach made her debut in the Super Mario 3D World game. Once the player grabbed the Super Bell special item, Cat Peach leaped into action! And now she's riding in the cute Cat Cruiser, complete with tail!"
 * "In addition to Funky Kong, you can find Cat Peach and the Cat Cruiser in pipes. This includes the All-Clear Pipe, which you can fire by clearing all of this tour's cups in blue. Be sure to cross every finish line!"

Cat Toad

 * Mario Kart Tour Twitter:
 * "The second half of the Cat Tour is inspired by the Super Mario 3D World game! The smiley Cat Toad is here! blue"

Trivia

 * Concept artwork shows that Princess Peach's Cat form was originally going to incorporate her brooch. It also shows that the Cat forms of characters would wear normal gloves, rather than having cat paw gloves.
 * In an earlier version of Super Mario 3D World, whenever Mario transformed into Cat Mario, he would say "nyaa", the Japanese sound for a cat's meow. In the final version, this was changed to "meow".
 * When in Cat form, a jingling sound can sometimes be heard when the player jumps.
 * If any character touches the Goal Pole in cat form in a level that uses the regular level victory music, that character says "meow" while doing the victory pose. This happens in both Super Mario 3D World and Super Mario Maker 2.
 * According to Super Mario 3D World director Kenta Motakura, Rosalina's cat suit is black (instead of her usual cyan) as a request from producer Yoshiaki Koizumi.
 * Mario's Fat Cat, Rabbid Peach's No Pity Kitty, and Rabbid Luigi's Jade Jaguar from Mario + Rabbids Kingdom Battle are modeled after Cat Mario, Cat Toad, and Cat Luigi, respectively.
 * When Peach is in her Cat form and uses her Floating Jump, she performs an animation similar to a Scuttle while clawing at the air.
 * Cat Toad's stamp artwork depicts him with a less dark shade of blue and with dark blue stripes, even though in his official artwork and game model, they are barely visible.
 * However, in the Mario Kart series, these stripes are more visible.
 * The coloration of the kittens from Bowser's Fury (except for the calico ones) match that of the Super Mario 3D World playable cast's Cat forms, with the exception of Mario.