I did not know you could make any enemies fight with other enemies in this game. (gonintendo.com)
Their lasers drain your armor and health at a ridiculous rate, and unlike other enemies in the game, they're not on the same plane as you. (heypoorplayer.com)
Like with many other enemies in this game, there is a shadowy version of them called the Dark Hammer Bro. (mariowiki.com)