Rabbit

"What part of ‘I'm not your lunch’ do you not understand? I already gave you the key! Put me down!"

- Rabbit

Rabbits of the Mushroom Kingdom, much like their "Real World" counterparts, are small, furry mammals with long ears and large hind paws. They are common in the fields and wooded regions of the kingdom. These animals also feature quite prominently in several Mario games.

Nintendo Comics System
In the Bowser Knows Best issue of Nintendo Comics System, the Koopa Family has a pet rabbit named Pookie who they often mistreat, but escapes soon after his introduction.

Nintendo Adventure Books
In Leaping Lizards, Morton Koopa Jr. sneaks into the palace, vandalizing it and transforming the Mushroom King into a rabbit with his magic wand. Luigi's attempt to change the king back with the same scepter only makes matters worse, changing the king from a normal bunny into a human-sized one. In a later book, Unjust Desserts, Magikoopa sneaks into the palace garden with some enemies he had shrunk by shapeshifting into a rabbit.

Super Mario 64
In Super Mario 64, a yellow rabbit named MIPS can be found in the basement of Peach's Castle. If caught, he will give Mario a secret Power Star. MIPS is found twice in the game: the first time after collecting 15 Power Stars, and the second time after 50 Power Stars.

Super Mario 64 DS
In Super Mario 64 DS, rabbits feature much more prominently. They are found throughout the castle grounds (and their locations vary from character to character). The designated rabbits for each character have a specific color - yellow for Yoshi, pink for Mario, green for Luigi, and orange for Wario. If caught, they would unlock mini-games for the player to play in the Rec Room.

Special Glowing Rabbits need to be caught to unlock a white door in the Character Door room, behind which was a secret Power Star. They will appear only after the player has collected 50 Power Stars. After catching eight of these rabbits, they will no longer appear.

A purple rabbit was found in the instruction booklet. Maybe Waluigi was really planned for the game?

The Korean version doesn't include the colored rabbits because it doesn't have mini games. All the other versions do include mini games, so the rabbits do appear in the game.

'''Yoshi (Yellow Rabbits):
 * 1-3: Outside the castle, at the end of the bridge.
 * 4: Outside the castle, in a patch of flowers to the right.
 * 5: Outside the castle, at the bottom of the drained moat.
 * 6: Outside the castle, to the left among the maze of hedges.
 * 7: In the basement, in front of the entrance to Lethal Lava Land.
 * 8: At the beginning of the game, Yoshi must find the rabbit with the key, located in the hedge maze. This rabbit will eventually be the same as rabbit 4 is located.

'''Mario (Pink Rabbits):
 * 1: Outside the castle, left of the bridge.
 * 2: Outside the castle, at the bottom of the moat (after it's been drained).
 * 3: Inside the room with the entrance to Jolly Roger Bay.
 * 4-5: In the basement, in front of the entrance to Lethal Lava Land.
 * 6: On the second floor of the castle, at the very top of the stairs.
 * 7: On the second floor of the castle, in the room with the large mirror wall and the entrance to Snowman's Land.

'''Luigi (Green Rabbits):
 * 1: Outside the castle, to the left among the maze of hedges.
 * 2: In the room with the entrance to Bob-omb Battlefield.
 * 3: Behind the castle, in the courtyard with the boos (back flip right outside the doorway).
 * 4: In the basement, in the room where the water can be drained from the moat (after doing it).
 * 5: On the second floor of the castle, just right of the doorway.
 * 6: In the room with the entrance to the Goomboss Battle (behind the Rec Room).
 * 7: Outside the castle, on the roof (150 stars needed to unlock the cannon).

'''Wario (Orange Rabbits):
 * 1: Outside the castle, past the bridge, to the far right.
 * 2: In the room with the entrance to Whomp's Fortress.
 * 3: In the basement, in the left hall with Toad.
 * 4: Behind the castle, in the courtyard with the Boos, behind the fountain.
 * 5: On the second floor of the castle, in the halls with the entrance to Tiny-Huge Island.
 * 6: On the third floor of the castle, near the entrance to Tick Tock Clock.
 * 7: On the third floor of the castle, in the upper alcove to the left, leading to Over the Rainbows.

Super Mario 3D World
Rabbits appear again in Super Mario 3D World, where they can again be chased and caught. When they are caught, they give prizes like Power-Ups, Coins, or Green Stars; rabbits that have a green light surrounding them means they have a Green Star. Larger variations also appear and will give Mega Mushrooms or Green Stars to the players when caught.

Super Mario Odyssey
Many rabbits can be found on the Dark Side of the Moon in Super Mario Odyssey, in a location known as Rabbit Ridge. These rabbits wear top hats, and resemble the ones from Super Mario 64 DS and Super Mario 3D World. They are also all white, and are ruled over by Madame Broode, an enormously-obese anthropomorphic rabbit, who is accompanied by her minions, the Broodals.

Mario Party Advance
In Mario Party Advance, Rabbits appear in the minigame Grabbit, in which the player must catch a certain amount of them with the given time limit.