Bros. Badges
Bros. Badges are helpfull relics in Mario and Luigi RPG 3 which you'll get later in the game. When the gauge fills up in a battle, you have the option to use a Bros. Badge by touching the two linked badges with the DS stylus. These will give Mario and Luigi all sorts of things depending on what badges they're equipped with, for exampel: restore 20% health. To increase your gauge you need to perform an attack either on a "GREAT" or "EXCELLENT" way, depending on which badges you're equipped with. In a battle you have the option to change badges, be aware that the gauge will start from the beginning when changing badges. Bros. Badges can be bought at a shop in Toad Town and can be founded in various places around the game. Bowser will not have the option to use Bros. Badges