The Hammerhead Bros. are two master blacksmiths from Mario & Luigi: Superstar Saga who resemble, forge, and upgrade Hammers. The older brother, Sledge, is red, while his younger brother, Mallet, is green, much like Mario and Luigi. They are first encountered in Hoohoo Village, after Mario and Luigi's path is blocked by a rock dropped by Fawful. Mario and Luigi must supply the Hammerhead Bros. with Hoohoo Blocks to create Hammers, which can then be used to destroy the rock. Before Mario and Luigi enter Beanbean Outskirts, the Hammerhead Bros. arrive to teach them how to use their hammer in battle.
During Minion Quest: The Search for Bowser, Captain Goomba and his squad encounter the Hammerhead Bros. in the level For the Love of Hammers, where the bros. welcome a pair of Hammer Bros. into their family, and sing a song about their love for Hammers together. Captain Goomba asks the Hammer Bros. to join their squad, but they don't want to leave until they hear that Bowser is in danger. Sledge suggests to have a battle to decide the outcome, with Mallet adding that the loser should do what the winner says. As Captain Goomba emerges victorious, the Hammerhead Bros. say goodbye, while the Hammer Bros. encourage the two that they will be able to make the Ultra Hammer someday. For a parting gift, the Hammerhead Bros. wish to sing the hammer song again. Captain Goomba refuses when asked to hear the song again, which prompts Sledge to tell him how to view cutscenes he has already seen.
The Hammer tutorial in the original game versus the remake
In non-Japanese versions of the original game, during the tutorial battle regarding hammer use, the battle background is of Beanbean Outskirts. At this point in the game, Mario and Luigi have not yet made it to this area, though they are about to. In the Japanese version, as well as Mario & Luigi: Superstar Saga + Bowser's Minions, the battle background is the correct area, Hoohoo Mountain.
Their wide heads and large, squinting eyes give them a resemblance to ancient Japanese dogū figures, fitting with how most Hoohooligans resemble haniwa figures.
* Exclusive to Mario & Luigi: Superstar Saga. • ** Exclusive to Mario & Luigi: Superstar Saga + Bowser's Minions. † Enemy, boss, or stat exclusive to the main game. • †† Enemy, boss, or stat exclusive to Minion Quest: The Search for Bowser. • ††† Enemy variants differ in Mario & Luigi: Superstar Saga + Bowser's Minions.