L33t Hamm3r Broz.
“AREA RESTRICTED. ALL NOOB INTRUDERS 2 B HAXORED BY US L33T HAMM3R BROZ.!”
The L33t Hamm3r Broz. (pronounced Leet Hammer Bros.) are a pair of Hammer Bros. from Mario & Luigi: Partners in Time. They were originally just like any other Hammer Bro., until the evil Shroobs brainwashed them and ordered the two to guard the Vim Factory. They are forced to wear mind-control helmets, which the Shroobs use to keep the Hammer Bros. under their control. While under the influence of the helmets, the Hammer Bros. speak in the internet hackers "language" known as "1337-speak" (pronounced "leet speak"). In the Japanese version, they speak completely in katakana, as opposed to hiragana, and in the Korean version, their speech is full of spelling and spacing errors. The pair assumed the name "L33t Hamm3r Broz." due to the way they speak in 1337 in the English version.
 Mario & Luigi: Partners in Time
When Mario, Luigi, Baby Mario, and Baby Luigi arrive in the Vim Factory, they are instantly confronted by the L33t Hamm3r Broz. After Mario and Luigi are captured by the factory's automated defenses, Baby Mario and Baby Luigi are forced to battle the L33t Hamm3r Broz. In battle, the L33t Hamm3r Broz. have 100 HP and attack by using the Bros. Ball technique. Using his hammer, one Hammer Bro. smashes the other into a ball, then hits him into either Baby Mario or Baby Luigi. To avoid the attack, the babies have to jump over the ball Hammer Bro. as he approaches. Sometimes, the Hammer Bro.'s hammer will break, sending the ball Bro. bouncing towards a baby. In this case, the baby Bro. should not jump, as the ball Bro. will simply bounce over the baby's head.
After one L33t Hamm3r Bro. is defeated, the remaining Bro. is forced to fight by himself. To attack, the sole Hammer Bro. tosses spinning hammers that roll on the ground. To defend against this attack, the baby Mario bros. have to jump over the hammers as they approach. To predetermine the menacing attack, the player has to watch carefully if the Hammer Bro. jumps or not. If it does, it will hit Baby Mario. If it doesn't, it will hit Baby Luigi. There will be a bouncy noise when The L33t's about to hit Baby Mario, and the noise that the Hammer Bros. make when they were talking (prior to the battle) when he's about to hit Baby Luigi. Ultimately, Baby Mario and Baby Luigi have to work together and defeat the second L33t Hamm3r Bro.
After defeating the L33t Hamm3r Broz., the Baby Mario brothers destroy their mind-control helmets, thus returning the Hammer Bros. to their normal state. Free from Shroob influence, the Hammer Bros. begin to speak normally again (and even comment on the strange manner of speaking they were just using). Grateful for being released, the Hammer Bros. give the Mario babies their Hammers and teach them how to use the weapons in battle (piggybacked or not) and outside battle. The bros. also teach the toddlers how to use Baby Drill technique before leaving. Since the adults were sucked up by the machine, they never received hammers, although they can help their past selves do more damage with the hammer.
The L33t Hamm3r Broz. battle is the second boss battle where the Baby Mario bros. must fight by themselves, after Baby Bowser.
 Names in Other Languages