Sledge Bro

Sledge Brothers are large overweight versions of Hammer Bros. that throw sledge hammers instead of regular ones and they can create small earthquakes as well.

Super Mario Bros. 3
The Sledge Brothers first appeared in Super Mario Bros. 3, where they replace Hammer Brothers in the Giant Land levels, as well as on the area's map. If a Sledge Brother sees Mario or Luigi, it attacks them by throwing sledge hammers at them; additionally, whenever a Sledge Brother jumps and lands on the ground, it creates a miniature earthquake which can paralyze Mario. To defeat a Sledge Brother, Mario can either jump on it, hit it with a Shell, use a fireball as Fire Mario, or a hammer as Hammer Mario to take it out.

Originally, their map icon was a Hammer Brother, but in the SNES remake in Super Mario All-Stars, their map icon changed into a green Hammer Brother. Their map icon was later changed to properly resemble a Sledge Brother in Super Mario Advance 4: Super Mario Bros. 3.

New Super Mario Bros.
Sledge Brothers reappear in the eighth world of New Super Mario Bros. The Sledge Brothers of New Super Mario Bros. can be defeated by jumping on them, hitting them with a fireball as Fire Mario or by touching them when Mario is empowered by a Starman. Like the Fire Bros., they only appear in World 8-7. Unlike in Super Mario Bros. 3, they don't always cause earthquakes with their every jump; this only happens when they ground pound, which can also destroy brick blocks. This is needed to obtain a Star Coin.

In the official strategy guide, Sledge Brothers are misnamed Sumo Bros., a name previously associated with an unrelated enemy from Super Mario World.

New Super Mario Bros. Wii
Sledge Brothers reappear in the game New Super Mario Bros. Wii as rare enemies, along with Hammer Bros. They are first encountered in World 6, where a pair of Sledge Brothers guard the exit of the cave in the world's second level. They also appear in World 7 in Ludwig's castle. Like in New Super Mario Bros., their jump and ground pound moves are separate, although they are no longer seen breaking stone blocks. The strategy guide still misnames them Sumo Bros.

Sledge Brothers, along with the Fire Bros. again, outnumbered the once common Hammer Bros., in this game, the former being in two levels while the latter only appears in one.

If a Sledge Brother is frozen by an Iceball the player must Ground Pound it to defeat it, as it is too heavy to pick up.

New Super Mario Bros. 2
Sledge Brothers reappear in New Super Mario Bros. 2, acting just like they did in past games. However, only one exists in the main game, appearing in World 2-2. They also appear as common enemies in the third course of the Coin Challenge Pack A in Coin Rush. Several later appear in the first course for the Mystery Adventures Pack. While the effects of a Gold Ring are active, Sledge Brothers are unaffected physically, but still give coins when defeated.

Sledge Brothers are once again mistakenly referred to as Sumo Bros. in the guide for unknown reasons.

New Super Mario Bros. U
Sledge Brothers make a return in New Super Mario Bros. U, appearing only in the level, Ludwig's Clockwork Castle, which is found at Meringue Clouds. They work like they have in the previous games. Only three are seen in the game. As the actual Sumo Bros. appear in this game, they are not to be mistaken for the other.

Sledge Brothers also appear in New Super Luigi U, where they're encountered in the course, All Aboard!.

The Adventures of Super Mario Bros. 3
Sledge Brothers make several appearances in The Adventures of Super Mario Bros. 3, where they are among the elite of King Koopa and the Koopalings' military forces. They are generally portayed as fairly tough soldiers, and manage to pose as major enemies to Mario, Luigi, Princess Toadstool and Toad in many episodes. Much like in the game, Sledge Brothers are able to cause tremors by jumping. One exception is in the episode "Never Koop a Koopa" when Princess Toadstool dupes a sledge brother into breaking down the door to the dungeon holding the Mario Bros.

Nintendo Adventure Books
A team of six Sledge Brothers, called the Hammers, appear as competitors in the International Mushroom Games in Leaping Lizards. The only one of them to have his named mentioned, Angus Boomer, appears to be their leader. They compete in all the events except the Super Triple Jump, since their stubby legs are only good for leaping vertically, not horizontally.

A pair of Sledge Brothers appear in Koopa Capers as members of Wendy O. Koopa's secret rebellion. When Luigi discovers the rebellion's camp in the Magma Pits, Wendy orders the Sledge Brothers to throw him into a boiling pool of water, but if Luigi whistles the correct tune, he makes them drowsy, and tricks one into leaving by asking for a pencil to leave a note for Mario as his last request. Luigi distracts the remaining Sledge Brother by pointing out how poorly a group of Koopa Troopas are doing a marching formation, and defeats him and his returning brother by knocking out some of the Koopa Troopas and kicking their shells at the two burly soldiers.

Yoshi's Safari
In Yoshi's Safari, Sledge Brothers appear as mini-bosses who attack Mario and Yoshi by throwing sledge hammers at them; a Sledge Brother can also immobilize Mario and Yoshi by stomping the ground. A Sledge Brother must be hit multiple times with Mario's Super Scope to defeat it in Yoshi's Safari. To avoid being hit, Mario can shoot the sledge hammers that the Sledge Brother throws, destroying them.

Mario Kart Wii
In Mario Kart Wii, some Sledge Brothers can briefly be seen in some sections of the Daisy Circuit and on a ship in D.K.'s Jungle Parkway, along with other spectators.

Trivia

 * In their original artwork for Super Mario Bros. 3, a Sledge Brother has mucus displayed flowing out of its nose. The in-game sprites also show this, though it is hardly visible. This is also evident in re-releases, although the mucus characteristic wasn't reused for the Sledge Brother again.
 * An ordinary Hammer Bro in Mario & Luigi: Superstar Saga resembles a Sledge Brother.
 * In New Super Mario Bros. Wii, if the player freezes a Sledge Brother while it is Ground Pounding, it will instantly stand up in its ice block. A similar thing happens with Piranha Plants and their relatives.