The Army Hammer Bro. is a major character and mini-boss fought before the final showdown with Bowser in Super Princess Peach. He is the one who found the Vibe Scepter in the game. The Army Hammer Bro. leads the percent of the Koopa Troop made up of the Hammer Bros., although (according to the Glossary) it's unknown if he is actually any stronger at all. He is notable for being the only Hammer Bro. known to possess horns sticking out of his helmet.
Army Hammer Bro., clad in black armor, is first seen in the game's opening, where Bowser sends him out to cause anarchy in the Mushroom Kingdom. Taking several of his Hammer Bros. along, as well as a rather vital Goomba, the Army Hammer Bro. sets off to fulfill his orders. In the end, he and his troops manage to do just what they were commanded to: not only did they kidnap several Toads, they also managed to take both Mario and Luigi themselves off to Bowser's Villa.
The Army Hammer Bro. was not seen until much later in the game (the final stage, to be exact). As Princess Peach walks up to Bowser, she sees him in front of his king. He sarcastically rants about Peach's courage, angering the princess. Then Bowser uses the Vibe Scepter to power him up with Rage, and he battles Peach. Although he can summon his Hammer Bro. underlings to assist him, all that Peach must do is whack him with Perry five times. Then, she will move on to fighting King Bowser himself.
- The Army Hammer Bro. is notably the only boss in the game to use his vibe (Rage) right at the beginning of the fight, rather than just after taking damage three times; additionally, he can use that vibe as many times as he wants (indicated by his roar), which he uses to summon more Hammer Bros. if there are little to no more of them.
- Another peculiarity of note is that, whenever the Army Hammer Bro. is roaring, Peach can't hit him with Perry; doing so only stuns her for a brief moment. Vibe Powers cause no damage to him while roaring either.