List of Mario franchise characters
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A
- Albatoss—a bird that the player rides in Super Mario Bros. 2.
- Albino Dino—a white dinosaur that appears in the puzzle chamber of Crystal Palace in Paper Mario.
- Alley Rat—a rat that appears in Super Mario RPG: Legend of the Seven Stars; palette swap of Rat Funk.
- Amanita—a mushroom enemy that appears in Super Mario RPG: Legend of the Seven Stars.
- Angry Sun—a sun that lunges itself at Mario in in Super Mario Bros. 3.
- Axem Rangers—a group of bosses Mario's party faces after completing the volcano in Super Mario RPG: Legend of the Seven Stars; an obvious parody of the Power Rangers, the Axem Rangers are Red, Black, Pink, Green, and Yellow, with a giant robot head that cumulates the power of the five.
B
- Baby Bowser—a baby version of Bowser that appeared in Super Mario World 2: Yoshi's Island.
- Baby Luigi—a baby version of Luigi that appears in Super Mario World 2: Yoshi's Island, Mario Kart: Double Dash!!, the Mario Tennis series, the Mario Golf series, and Mario Superstar Baseball.
- Baby Mario—a baby version of Mario that appears in Super Mario World 2: Yoshi's Island, Mario Kart: Double Dash!!, the Mario Tennis series, the Mario Golf series, and Mario Superstar Baseball.
- Badge Bandit—a crook found in the Pit of 100 Trials in Paper Mario: The Thousand-Year Door, who steals your badges; palette swap of Bandit.
- Bahamutt—a red dragon summoned by Chester and Magikoopa in Super Mario RPG: Legend of the Seven Stars.
- Bandana Blue—a shark lackey of Jonathan Jones in Super Mario RPG: Legend of the Seven Stars; palette swap of Bandana Red.
- Bandana Red—a shark lackey of Jonathan Jones in Super Mario RPG: Legend of the Seven Stars; palette swap of Bandana Blue.
- Banzai Bill—a giant version of Bullet Bill that appeared in Super Mario World.
- Beezo—a spear-wielding, Shy Guy-derivative enemy that debuted in Super Mario Bros. 2 and appeared as "Shy Away" in Super Mario RPG: Legend of the Seven Stars.
- Belome—a giant, dog-like boss that appears in Super Mario RPG: Legend of the Seven Stars.
- Big Bertha—a giant fish, and female counterpart to Boss Bass, that spouts small Cheep-Cheeps; appears in Super Mario Bros. 3. "Big Bertha" is also the name of a Blaster-like cannon enemy in Super Mario RPG: Legend of the Seven Stars which appears as a golden Bullet Bill in the overworld.
- Birdo—a bird-like character that appears both as a species and an individual in Super Mario Bros. 2, Super Mario RPG: Legend of the Seven Stars, Mario and Luigi: Superstar Saga, the Mario Tennis series, the Mario Golf series, and Mario Superstar Baseball.
- Birdy—a bird-like character that appears in Super Mario RPG: Legend of the Seven Stars; a palette swap of Blue Bird.
- Blargg—a lava-dwelling dragon that appears in Super Mario World.
- Blaster (or Bill Blaster)—the device from which Bullet Bill is launched; appears in Super Mario RPG: Legend of the Seven Stars and Paper Mario.
- Bloober (or Blooper)—an enemy jellyfish that appears in Super Mario Bros., Super Mario Bros.: The Lost Levels, and Super Mario Bros. 3.
- Blue Bird—a bird-like character that appears in Super Mario RPG: Legend of the Seven Stars; a palette swap of Birdy.
- Bob-omb—a living bomb creature that appears in Super Mario Bros. 2, Super Mario Bros. 3, Super Mario World, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Super Mario Sunshine, Mario Kart: Double Dash!!, Mario and Luigi: Superstar Saga, and Paper Mario: The Thousand-Year Door.
- Boo (or Big Boo, Bigger Boo, or Boolossus)—a ghost that appears frequently in Mario games, including Super Mario Bros. 3, Super Mario World, Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Paper Mario, Luigi's Mansion, Super Mario Sunshine, Mario and Luigi: Superstar Saga, Paper Mario: The Thousand-Year Door, the Mario Kart series, the Mario Tennis series, the Mario Golf series, and the Mario Party series.
- Boom Boom—a recurring boss in Super Mario Bros. 3.
- Boomer—a boss and guardian of Exor in Super Mario RPG: Legend of the Seven Stars.
- Booster—a boss with his own amusement tower in Super Mario RPG: Legend of the Seven Stars.
- Boshi—Yoshi's racing rival on Yoshi Island in Super Mario RPG: Legend of the Seven Stars.
- Boss Bass—a giant fish, and male counterpart to Big Bertha, that chases Mario and attempts to swallow him whole; appears in Super Mario Bros. 3 and Super Mario RPG: Legend of the Seven Stars.
- Bowletta—a turtle boss in Mario and Luigi: Superstar Saga.
- Bowser—the main villain and usual final boss of the series, debuted in Super Mario Bros. and appears in Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario World, Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Paper Mario, Super Mario Sunshine, Mario and Luigi: Superstar Saga, Paper Mario: The Thousand-Year Door, the Mario Kart series, the Mario Tennis series, the Mario Golf series, and the Mario Party series.
- Bowser Koopa Junior—Bowser's son that appears in Super Mario Sunshine, Mario Kart: Double Dash!!, the Mario Tennis series, the Mario Golf series, and the Mario Party series.
- Bowyer—an arrow-flinging boss in the woods of Super Mario RPG: Legend of the Seven Stars.
- Box Boy—a treasure chest enemy and palette swap of Chester, Hidon, and Pandorite that appears in Super Mario RPG: Legend of the Seven Stars.
- Brighton—a sun-like character that appears in Mario Party 6.
- Bullet Bill—a propelled bullet that charges towards Mario; debuted in Super Mario Bros. and appears in Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario Land, Super Mario World, Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Paper Mario, Super Mario Sunshine, the Mario Party series, and as a bat in Mario Superstar Baseball.
- Bundt (or Raspberry)—a living cake boss in Super Mario RPG: Legend of the Seven Stars.
- Buster Beetle—an aggressive counterpart to Buzzy Beetle that hurls boxes at the player; appears in Super Mario Bros. 3.
- Buzzer—a bee and palette swap of Stinger; appears in Super Mario RPG: Legend of the Seven Stars.
- Buzzy Beetle—a cave-dwelling, hard-shelled insect that debuted in Super Mario Bros. and has appeared in Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario World, and Paper Mario.
C
- Cackletta—a boss that appears in Mario and Luigi: Superstar Saga.
- Cackletta's Ghost—the spirit of Cackletta which is imprisoned inside Bowletta's body in Mario and Luigi: Superstar Saga.
- Carroboscis—a giant carrot enemy that appears in Super Mario RPG: Legend of the Seven Stars.
- Cataquack—a large, billed creature that lunges at Mario and launches him skyward; similar to Plungelo, it appears in Super Mario Sunshine.
- Chain Chomp—a furious but restrained enemy that debuted in Super Mario Bros. 3; it has appeared in Super Mario World, Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Super Mario Sunshine, and the Mario Kart series.
- Chargin' Chuck—a football-playing turtle that appears in Super Mario World.
- Cheep-Cheep (or Blurp, or Goby)—a fish that debuted in Super Mario Bros. and has appeared in Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario World, Super Mario RPG: Legend of the Seven Stars, and Paper Mario.
- Chef Torte—a cake-baking chef that appears as a boss in Super Mario RPG: Legend of the Seven Stars.
- Chef Torte's Apprentice—a boss in Super Mario RPG: Legend of the Seven Stars.
- Chester—a treasure chest enemy and palette swap of Box Boy, Hidon, and Pandorite that appears in Super Mario RPG: Legend of the Seven Stars.
- Chewy—an aggressive, walking Piranha plant variant that appears in Super Mario RPG: Legend of the Seven Stars.
- Chill Bully—an ice version of Big Bully that appears as a boss in Super Mario 64.
- Chomp Chomp—a variant of Chain Chomp that appears in Super Mario RPG: Legend of the Seven Stars.
- Chow—a mechanical dog that appears in Super Mario RPG: Legend of the Seven Stars.
- Chuck Quizmo—an inquisitive worm that appears in Paper Mario.
- Clawgrip—a crab-like boss that appears in Super Mario Bros. 2.
- Clubba—a mace-wielding turtle that appears in Paper Mario and Paper Mario: The Thousand-Year Door.
- Croco—a recurring, thieving crocodile boss that appears in Super Mario RPG: Legend of the Seven Stars.
- Crook—tiny thieves that steal from Mario's party in Super Mario RPG: Legend of the Seven Stars; palette swaps of Sackits.
- Crusty—a crab creature in Super Mario RPG: Legend of the Seven Stars.
- Culex—a Final Fantasy-style hidden boss that appears in Super Mario RPG: Legend of the Seven Stars.
D
- Dangling Ghost—a spirit which dangles from the ceiling of various castles in Super Mario World 2: Yoshi's Island.
- Diddy Kong—from the Donkey Kong Country series, appears in Mario Golf: Toadstool Tour, Mario Kart: Double Dash!!, and Mario Power Tennis.
- Dino Dino—a giant blue dinosaur found in the Dino Dino Jungle level of Mario Kart: Double Dash!!
- Dixie Kong—from the Donkey Kong Country series, appears in Mario Superstar Baseball.
- Dodo—Valentina's dense servant and a boss that appears in Super Mario RPG: Legend of the Seven Stars.
- Donkey Kong—the main character from the Donkey Kong arcade series; appears in the Mario Kart series, the Mario Tennis series, the Mario Golf series, the Mario Party series, and Mario vs. Donkey Kong.
- Donkey Kong Junior—the son of Donkey Kong from the Donkey Kong arcade series, appears in Super Mario Kart and Mario's Tennis.
- Doopliss—a ghost boss that appears in Paper Mario: The Thousand-Year Door.
- Dorrie—a friendly Loch Ness Monster-esque dinosaur that appears in Super Mario 64 and in the Mario Party series.
- Dr. Mario—Mario as a physician; protagonist of the Dr Mario series.
- Dry Bones—a collapsable Koopa Troopa skeleton that debuted in Super Mario Bros. 3 and has appeared in Super Mario World, Super Mario RPG: Legend of the Seven Stars, Paper Mario, and Paper Mario: The Thousand-Year Door.
- Duplighost—a ghost that appears in Paper Mario.
E
- Eely-Mouth—a boss in Super Mario Sunshine.
- Eggbert—the shell from whence Birdo pops in Super Mario RPG: Legend of the Seven Stars.
- Enigma—an assortment of clustered pig heads found in the Moleville Mines in Super Mario RPG: Legend of the Seven Stars; palette swap of Gorgon.
F
- Fawful—a boss that appears in Mario and Luigi: Superstar Saga.
- Fireball—a blue version of Sparky that appears in the castles of Super Mario RPG: Legend of the Seven Stars.
- Fire Brothers—a variant of the Hammer Brothers that appear in Super Mario Bros. 3, spitting fire.
- Fire Chomp—a floating Chomp which spits fire in Super Mario Bros. 3.
- Fishin' Boo—a Boo that hangs in a cloud, dangling blue fire from a fishing pole; appears in Super Mario World.
- FLUDD (or Flash Liquizider Ultra Dousing Device)—a robotic device designed for shooting water that appears in Super Mario Sunshine and Mario Power Tennis.
- Flurry—an ice creature that appears in Super Mario Bros. 2.
- Frogfucius—a wise old frog and Mallow's adopted father in Super Mario RPG: Legend of the Seven Stars; named after Confucius.
- Frogog—an anthromorphic frog creature that appears in Super Mario RPG: Legend of the Seven Stars.
- Fryguy—a giant fire boss that appears in Super Mario Bros. 2.
- Fuzzy—a monster that hangs on tracks in Super Mario World; also appears in Paper Mario and Paper Mario: The Thousand-Year Door.
G
- Gargantua Blargg—a gigantic Blargg that emerges from lava pits in Super Mario World 2: Yoshi's Island.
- Geckit—a gecko enemy that appears in Super Mario RPG: Legend of the Seven Stars; a palette swap of Gecko.
- Gecko—a gecko enemy that appears in Super Mario RPG: Legend of the Seven Stars; a palette swap of Geckit.
- Geno—a mystical alien spirit inhabiting a toy doll that appears in Super Mario RPG: Legend of the Seven Stars.
- Goomba—the very first enemy that appears in Super Mario Bros. and a staple character of the series. Goombas also appear in Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario Land, Super Mario World, Super Mario Land 2: 6 Golden Coins, Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Paper Mario, Super Mario Sunshine, Mario and Luigi: Superstar Saga, Paper Mario: The Thousand-Year Door.
- Goombario—a young Goomba that appears in Paper Mario.
- Goombella—a female Goomba that appears in Paper Mario: The Thousand-Year Door.
- Grate Guy—a boss and Casino owner in Super Mario RPG: Legend of the Seven Stars.
- Guerilla—a giant ape reminiscent of Donkey Kong that chucks rocks at the player in Super Mario RPG: Legend of the Seven Stars.
H
- Hammer Brothers—a duo of helmeted turtles that throw hammers at Mario; they first appeared in Super Mario Bros. and have also appeared in Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario World, Super Mario RPG: Legend of the Seven Stars, Paper Mario, and Mario and Luigi: Superstar Saga.
- Hammerhead Brothers, a duo of rocky beings who can weld new hammers for Mario and Luigi in Mario and Luigi: Superstar Saga.
- Heavy Troopa'—a fat Koopa Paratroopa that appears in Super Mario RPG: Legend of the Seven Stars.
- Hidon—a treasure chest enemy and palette swap of Box Boy, Chester, and Pandorite that appears in Super Mario RPG: Legend of the Seven Stars.
- Hookbill the Koopa—a magically empowered Koopa Troopa that appears as a boss in Super Mario World 2: Yoshi's Island.
- Hothead—a giant Sparky that appears in Super Mario World.
I
- Iggy Koopa appears in Super Mario Bros. 3 and Super Mario World.
- Il Piantissimo—a Pianta imposter that challenges Mario to races in Super Mario Sunshine.
J
- Jagger—an armored Koopa Troopa and apprentice of Jinx in Super Mario RPG: Legend of the Seven Stars.
- Jester—a jester enemy in Super Mario RPG: Legend of the Seven Stars.
- Jinx—a martial arts expert in Super Mario RPG: Legend of the Seven Stars that challenges Mario to a few fights.
- Jonathan Jones—a shark boss in the sunken ship of Super Mario RPG: Legend of the Seven Stars who befriends Mario after being beaten.
K
- K-9—a mechanical dog that appears in Super Mario RPG: Legend of the Seven Stars.
- Kamek the Magikoopa—a Magikoopa that debuted in Super Mario World 2: Yoshi's Island as the main antagonist and has appeared in Mario and Luigi: Superstar Saga and the Mario Party series.
- Kammy Koopa—a female Magikoopa that appeared in Paper Mario and Paper Mario: The Thousand-Year Door.
- King Boo—the head Boo who debuted as the final boss of Luigi's Mansion and appears in Super Mario Sunshine, Mario Kart: Double Dash!!, and Mario Superstar Baseball.
- King Calamari (or Gooper Blooper)—a squid-like sunken ship boss in Super Mario RPG: Legend of the Seven Stars that appears as "Gooper Blooper" in Super Mario Sunshine.
- Klaptrap—an alligator from the Donkey Kong Country series that appears in Mario Power Tennis.
- Knife Guy—a knife-juggling boss (and later friend of Mario) in Super Mario RPG: Legend of the Seven Stars.
- Koopa Clown Car—a mechanical, hovering creature used by Bowser; debuted in Super Mario World and also appears in Super Mario RPG: Legend of the Seven Stars, Paper Mario, and Paper Mario: The Thousand-Year Door.
- Koopa Kids (or Koopalings)—seven unique children of Bowser that appear in Super Mario Bros. 3 and Super Mario World.
- Koopa Paratroopa (or Koopa Para-Troopa)—a flying variant of the Koopa Troopa that appears in Super Mario Bros., Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario World, Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, and Paper Mario.
- Koopa Troopa (or Terrapin)—a hard-shelled, turtle-like enemy that appears in many Mario games, including Super Mario Bros., Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario Land, Super Mario World, Super Mario Kart, Super Mario Land 2: 6 Golden Coins, Super Mario World 2: Yoshi's Island, Mario's Tennis, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Paper Mario, and Super Mario Sunshine.
- Kooper—a Koopa Troopa allied with Mario that appears in Paper Mario.
L
- Lady Bow—a Boo princess that appears in Paper Mario.
- Lakilester—a Lakitu that appears in Paper Mario.
- Lakitu—a turtle-like creature that usually hangs in a cloud, often throwing Spikeys at Mario. Lakitu debuted in Super Mario Bros., and has appeared in Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario World, Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Paper Mario, the Mario Kart series, and the Mario Party series.
- Larry Koopa appears in Super Mario Bros. 3 and Super Mario World.
- Lemmy Koopa appears in Super Mario Bros. 3 and Super Mario World.
- Lil' Sparky—a tiny version of Sparky that appears in Super Mario World.
- Ludwig Von Koopa appears in Super Mario Bros. 3 and Super Mario World.
- Luigi Mario—Mario's brother, and very often the second player in two player games. He first appeared in Mario Bros. and has been in most Mario games since, with notable exceptions such as Super Mario RPG: Legend of the Seven Stars and Super Mario 64. Luigi is the star of Mario Is Missing! and Luigi's Mansion, in both of which his objective is to find and rescue his brother Mario.
M
- Mack—a spring boss in Super Mario RPG: Legend of the Seven Stars.
- Magikoopa—a robed turtle magician that debuted in Super Mario World and has appeared in Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Paper Mario, Mario and Luigi: Superstar Saga, and Mario Superstar Baseball; was slated to appear in Mario Kart 64 but was replaced by Wario before the final release.
- Magmite—a cave creature in Super Mario RPG: Legend of the Seven Stars.
- Mallow—a marshmallow-like character found early in Super Mario RPG: Legend of the Seven Stars.
- Marching Milde—a balloon boss in Super Mario World 2: Yoshi's Island.
- Mario—the main hero of the series, debuting in Donkey Kong as "Jumpman" and first appearing as "Mario" in Mario Bros.
- Mecha Bowser—a giant, mechanical version of Bowser that appears in Paper Mario and Super Mario Sunshine.
- Mechakoopa—a mechanical toy Koopa used to pelt Bowser's Koopa Clown Car in Super Mario World; also appears in Super Mario RPG: Legend of the Seven Stars.
- Megasmilax—a giant Piranha plant boss in Super Mario RPG: Legend of the Seven Stars.
- Merlon—a wizard who assists Mario and his partners in Paper Mario and Paper Mario: The Thousand-Year Door.
- Metal Mario is a metal version of Mario that appeared in Super Mario 64.
- Micro-Goomba—a tiny Goomba, usually found around larger Goombas and in groups; originally from Super Mario Bros. 3, they have also appeared in Super Mario RPG: Legend of the Seven Stars and Super Mario 64.
- Mini-Fry Guy—one of several creatures that breaks off from the larger Fryguy in Super Mario Bros. 2.
- MIPS—the armless yellow rabbit that appears in the basement of Peach's Castle in Super Mario 64.
- Monstermama—a friendly toadstool creature in Super Mario RPG: Legend of the Seven Stars.
- Monty Mole—a mole enemy that appears in Super Mario World, Super Mario 64, Mario Kart 64, and Super Mario Sunshine.
- Morton Koopa Junior appears in Super Mario Bros. 3 and Super Mario World.
- Mouser—a large mouse boss that appears in Super Mario Bros. 2.
- Mr. I—a giant eyeball that first appeared in Super Mario 64, where he shot blue laser-type balls and later in Mario Party 2, where he appeared in one of the boards and moved your character around by rolling you across the board. He was mentioned in Mario Golf for the N64 as "Big Mr. I" and later appeared in Super Mario 64 DS. The sign that mentioned Mr. I in level 5 from the original Super Mario 64 was not seen in Super Mario 64 DS. Mr. I recently appeared in the game, Mario Party Advance for the GBA.
- Mr. Kipper—a fish in Super Mario RPG: Legend of the Seven Stars.
N
- Ninji—a star-like creature that appears in Super Mario Bros. 2, Super Mario World, and Paper Mario. In Super Mario Bros. 2, "Ninji 1" will chase the player, while "Ninja 2" will stay in place and hop repeatedly.
- Nipper plant (or Chompweed)—a white plant that leaps upward to bite Mario. It may stay motionless or walk around, and even spit fire. Nipper plants debuted in Super Mario Bros. 3 and also appeared in Super Mario World 2: Yoshi's Island, and Super Mario RPG: Legend of the Seven Stars.
- Noki—friendly, crab-like creatures that converse with Mario in Super Mario Sunshine.
O
- Ostro—a running ostrich that appears in Super Mario Bros. 2.
P
- Pandorite—a treasure chest enemy and palette swap of Box Boy, Chester, and Hidon that appears in Super Mario RPG: Legend of the Seven Stars.
- Paragoomba (or Para-Goomba)—a flying Goomba, some of which spout Mini-Goombas, that debuted in Super Mario Bros. 3 and has appeared in Super Mario World, Super Mario Land 2: 6 Golden Coins, Paper Mario, and Paper Mario: The Thousand-Year Door.
- Parakarry—a Koopa Paratroopa allied with Mario that appears in Paper Mario.
- Pauline—Mario's girlfriend in the Donkey Kong arcade game; often confused with Princess Toadstool.
- Petey Piranha—a giant, goo-spouting Piranha Plant boss that appears in Super Mario Sunshine and as a playable character in Mario Kart: Double Dash!!.
- Phanto—a floating mask that guards keys in Super Mario Bros. 2.
- Pianta—a species of friendly characters that debuted in Super Mario Sunshine and have also appeared in Mario Kart: Double Dash!!, Paper Mario: The Thousand-Year Door, Mario Power Tennis, and Mario Superstar Baseball.
- Pidgit—a carpet-riding bird that appears in Super Mario Bros. 2 and as "Pidget Bill" in Super Mario World.
- Piranha plant (or Pakkun Flower, or Jumpin' Piranha plant)—a common Mario enemy that usually appears extending (or jumping) from a pipe. It debuted in Super Mario Bros. and has also appeared in Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario Land, Super Mario World, Super Mario Land 2: 6 Golden Coins, Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Paper Mario, Super Mario Sunshine, Paper Mario: The Thousand-Year Door, the Mario Kart series, and the Mario Party series.
- Plungelo—a large, billed creature that lunges at Mario and launches him skyward; similar to Cataquack, it appears in Super Mario Sunshine.
- Podobo—a lava ball that appears in Super Mario Bros., Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario World, Super Mario Kart, Super Mario World 2: Yoshi's Island, and Super Mario RPG: Legend of the Seven Stars.
- Pokey—a cactus-like enemy that debuted in in Super Mario Bros. 2, and appears in Super Mario World, Super Mario World 2: Yoshi's Island, Super Mario 64, Paper Mario, Super Mario Sunshine, Mario Party 5, and Mario Kart: Double Dash!!.
- Princess Daisy—Mario's love interest in Super Mario Land.
- Princess Peach (or Princess Toadstool)—Mario's main love interest, debuting in Super Mario Bros. and appearing in most of Mario's games since.
- Professor E. Gadd—the mad scientist and inventor who debuted in Luigi's Mansion and has appeared in Mario and Luigi: Superstar Saga as well as being alluded to in Super Mario Sunshine and Mario Party Advance, by way of his inventions.
- Punchinello—a bomb-happy cave boss in Super Mario RPG: Legend of the Seven Stars.
Q
R
- Raphael the Raven—a giant raven boss in Super Mario World 2: Yoshi's Island that also appears in Paper Mario.
- Rat Funk—a sewer rat that appears in Super Mario RPG: Legend of the Seven Stars; palette swap of Alley Rat.
- Rex—a purple dinosaur that appears in Super Mario World.
- Reznor—a large, grey, fire-breathing dinosaur that appears in groups in Super Mario World.
- Roy Koopa appears in Super Mario Bros. 3 and Super Mario World.
S
- Sackit—tiny thieves that steal from Mario's party in Super Mario RPG: Legend of the Seven Stars; palette swaps of Crooks.
- Shadow Mario—the recurring antagonist in Super Mario Sunshine.
- Shaman—a mysterious, hooded creature that appears in Super Mario RPG: Legend of the Seven Stars, Paper Mario, and Paper Mario: The Thousand-Year Door.
- Shy Guy—a common, masked enemy that debuted in Super Mario Bros. 2; it has since appeared in many incarnations in Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Paper Mario, Luigi's Mansion, Paper Mario: The Thousand-Year Door, Mario Pinball Land, the Mario Kart series, and the Mario Tennis series.
- Shyster—a Shy Guy-derivative enemy in Super Mario RPG: Legend of the Seven Stars.
- Sidestepper—a crab that appears in Mario Bros..
- Sling Shy—a variant of Shy Guy that appears in Super Mario RPG: Legend of the Seven Stars.
- Smilax—a Piranha plant-like enemy that appears in Super Mario RPG: Legend of the Seven Stars.
- Smithy—the main villain and final boss of Super Mario RPG: Legend of the Seven Stars.
- Snifit—a masked, projectile-spitting creature that debuted in Super Mario Bros. 2. In several incarnations it has also appeared in Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Mario Party 2, and Mario and Luigi: Superstar Saga.
- Snufit—a floating variation on Snifit that appears in Super Mario 64.
- Spark (or Sparky)—a ball of fire that appears in Super Mario Bros. 2, Super Mario World, Super Mario RPG: Legend of the Seven Stars, and Paper Mario.
- Spikester—a spiked creature related to Spikey; appears in Super Mario RPG: Legend of the Seven Stars.
- Spikey (or Spiny)—a spiked turtle-like enemy that appears in Super Mario Bros., Super Mario Bros.: The Lost Levels, Super Mario Bros. 3, Super Mario World, Super Mario RPG: Legend of the Seven Stars, and Super Mario 64.
- Stinger—a bee and palette swap of Buzzer; appears in Super Mario RPG: Legend of the Seven Stars.
- Sushie—a Cheep-Cheep allied with Mario in Paper Mario.
T
- Tatanga the Mysterious Spaceman—the final boss of Super Mario Land.
- Thwimp—a miniature version of Thwomp that appears in Super Mario World.
- Thwomp—a large granite creature that debuted in Super Mario Bros. 3 and has appeared in Super Mario World, Super Mario RPG: Legend of the Seven Stars, and Super Mario 64.
- Toad—the ever-helpful humanoid mushroom that debuted in Super Mario Bros., and has appeared in virtually every game in which Mario does.
- Toadette—a female derivative of Toad who appears in Mario Kart: Double Dash!!, Mario Party 6, Paper Mario: The Thousand-Year Door, Mario Party Advance, Mario Superstar Baseball, and Mario Power Tennis.
- Toadsworth—Princess Peach's steward that debuted in Super Mario Sunshine and appears in Mario and Luigi: Superstar Saga, Mario Kart: Double Dash!!, Paper Mario: The Thousand-Year Door, Mario Power Tennis, Mario Golf: Toadstool Tour, Mario Superstar Baseball, and Mario Party 7.
- Torpedo Ted—an underwater Bullet Bill variant that appears in Super Mario World.
- Tryclyde—a three-headed snake boss that appears in Super Mario Bros. 2.
- Tweeter—a hopping, masked, bird-like creature that appears in Super Mario Bros. 2.
- Twila—a moon-like character that appears in Mario Party 6.
U
- Ukiki—a monkey that likes to steal Mario's hat, who appears in Super Mario 64 and later as a character that emerges from an item capsule in Mario Party 5.
- Unagi—an underwater sea serpent in Super Mario 64.
V
- Valentina—a boss that appears in Super Mario RPG: Legend of the Seven Stars.
- Venus Fire Trap—fire-spitting plant that appears in Super Mario Bros. 3.
W
- Waluigi—an evil version of Luigi, appears in Mario Kart: Double Dash!!, the Mario Tennis series, the Mario Golf series, and the Mario Party series.
- Wario—Mario's evil doppelgänger who debuted in Super Mario Land 2: 6 Golden Coins, but has since branched off into his own series as well as appeared in the Mario Kart series, the Mario Tennis series, the Mario Golf series, and the Mario Party series.
- Wart—the final, frog-like, vegetable-hating boss of Super Mario Bros. 2.
- Watt—a female Spark that appears in Paper Mario.
- Wendy O. Koopa appears in Super Mario Bros. 3 and Super Mario World.
- Whomp—a variant on Thwomp that walks around and hurls himself onto Mario when approached; appears in Super Mario 64.
- Wiggler—a passive-aggressive caterpillar that appears in Super Mario World, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, and Super Mario Sunshine.
X
- X-Naut—white-haired scientist creatures that serve Sir Grodus in Paper Mario: The Thousand-Year Door.
Y
- Yaridovich—a seaside boss in Super Mario RPG: Legend of the Seven Stars.
- Yoshi—Mario's dinosaur/dragon mount and best friend who debuted in Super Mario World and has since branched off into his own series. Yoshi appears in Yoshi, Mario Is Missing!, Yoshi's Cookie, Yoshi's Safari, Super Mario World 2: Yoshi's Island, Super Mario RPG: Legend of the Seven Stars, Super Mario 64, Paper Mario, Super Mario Sunshine, the Mario Kart series, the Mario Tennis series, the Mario Golf series, and the Mario Party series.