From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Fury&oldid=2530059"
Fury is a status effect in Mario & Luigi: Bowser's Inside Story that can only be obtained by Bowser when he takes too much damage. When in this state, the damage Bowser deals and takes is doubled. To cure this effect, Bowser can eat a Refreshing Herb, have a set amount of turns pass, or defeat the enemies on screen. While in the Fury status, Bowser flashes red, clenches his fists, and shows a much angrier facial expression with gritted fangs and puffs of smoke spewing overhead. This status effect combines POW-Up and DEF-Down. Choombas go through a similar phase when fired up by Coalbits, making them deal more damage, move faster, and glow red.