Sumo Bro.

From the Super Mario Wiki

Sumo Brothers, occasionally shortened to Sumo Bros., are a sub-species of Hammer Brothers who first appeared in Super Mario World.

In Super Mario World, Sumo Bros. are large and orange in color and wear black shells, they also have a spike on top of their head, meaning Mario or Luigi will injure himself if he jumps on one. In Super Mario World, Sumo Brothers would stand on top of blocks and attack Mario by stomping their foot, which will cause a spark to drop below; this spark will ignite when it hits the ground, making a wall of fire. Sumo Bros. could only be defeated by throwing a Shell at them, by hitting them with a Cape as Cape Mario or by touching them with Mario when he is powered-up by a Starman. Hitting the block they are standing on from below also works, but is more difficult than other ways due to the fires caused by their lightning-stomp attack.

Recently, the name Sumo Bro. has been mistakenly applied to the unrelated species of enemies known as Sledge Bros., who utilize the name in New Super Mario Bros.

[edit] Appearances in Other Media

A single Sumo Bro., though called a Fire Sumo, appeared in the Super Mario World episode "Mama Luigi". This Fire Sumo appears to attack Luigi as he is exploring the abandoned Dome City; this Fire Sumo ends up stomping the ground beneath Luigi hard enough to cause it to crack, sending Luigi plummeting downward.

Super Mario World Protagonists Mario | Luigi | Princess Toadstool | Yoshi | Blue Yoshi | Red Yoshi | Yellow Yoshi Bosses Iggy Koopa | Morton Koopa Jr. | Lemmy Koopa | Ludwig von Koopa | Roy Koopa | Wendy O. Koopa | Larry Koopa | Bowser Items Mushroom | Fire Flower | Cape Feather | Star | 1-Up Mushroom | 3-Up Moon | Key | Coin Worlds of Dinosaur Land Yoshi's Island | Donut Plains | Vanilla Dome | Twin Bridges | Forest of Illusion | Chocolate Island | Valley of Bowser | Star World | Special World Enemies Amazing Flyin' Hammer Bro. | Ball 'n' Chain | Banzai Bill | Big Boo | Big Steely | Blargg | Blurp | Bob-omb | Bony Beetle | Boo Buddy | Boo Buddy Block | Bowser | Bullet Bill | Chainsaw | Chargin' Chuck | Cheep-Cheep | Dino Rhino | Dino-Torch | Dry Bones | Eerie | Falling Spike | Firebar | Fishbone | Fishin' Boo | Fishin' Lakitu | Floating Mine | Goomba | Grinder | Hothead | Jumping Piranha Plant | Lakitu | Li'l Sparky | Magikoopa | Mecha-Koopa | Mega Mole | Monty Mole | Muncher | Ninji | Para-bomb | Paragoomba | Pipe Lakitu | Piranha Plant | Podoboo| Pokey | Porcu-Puffer | Rex | Reznor | Rip Van Fish | Spike Top | Spiny | Sumo Bro. | Swooper | Thwimp | Thwomp | Torpedo Ted | Urchin | Volcano Lotus | Wiggler

Fire Creatures
Angry Sun | Blargg | Bomb | Burn Bit | Crusher Blargg | Czar Dragon | Ember | Fiery Bubble | Fire Chomp | Fire Elemental Ghost | Fire Snake | Fireball | Fryguy | Fryguys | Gargantua Blargg | Helio | Hot Foot | Hot Lips | Hothead | Kleever | Lava Bubble | Lava Bud | Lava Drop | Lava Ghost | Lava Piranha | Li'l Sparky | Mini Fryguy | Petit Piranha | Phantom Ember | Podoboo | Pyro Guy | Pyrosphere | Sparky | Sun | Torcher | Trouble Bug
Fire-Related Creatures
Baby Bowser | Birdo | Bowser | Bowser Jr. | Calm Volcano Plant | Dhalsim | Dino-Torch | Dragon Wario | Fiery Dino Piranha | Fire Bro. | Fire God (Mario & Luigi: Superstar Saga) | Fire God (The Super Mario Bros. Super Show!) | Fire Luigi | Fire Mario | Fire Wario | Flaming Wario | Flare | Gao | Iggy Koopa | Jumping Piranha Plant | Kerozene | King Totomesu | Lava Lotus | Ludwig von Koopa | Sumo Bro. | Tryclyde | Venus Fire Trap | Vivian | Volcannon | Volcano Lotus | Zeus Guy (Bandit) | Zeus Guy (Snifit)

Hammer Bro. Characters
Army Hammer Bro. | Bamma | Border Bros. | Dr. Topper | Flare | Hamma Jamma | Hamma Jamma's Father | Hamma Jamma's Grandfather | L33t Hamm3r Broz. | Mr. Hammer | Hammer Bro. Captain
Hammer Bros. Species
Amazing Flyin' Hammer Bro. | Boomerang Bro. | Business Bro. | Calm Amazing Flyin' Hammer Bro. | Calm Hammer Bro. | Chomp Bro. | Dark Boomerang Bro. | Dark Fire Bro. | Dark Hammer Bro. | Fire Bro. | Goomerang Bro. | Hammer Bro. | Limbo Bro. | Sledge Bro. | Sumo Bro. | Yo Bro.