Biffidus X

Bowser's Inside Story enemy
Biffidus X
Location(s)	The Gauntlet
Battled by	Mario and Luigi
Role	Support
Level	17
HP	32 (48)
POW	56 (140)
DEF	34 (51)
SPEED	110 (165)
Fire	Double
Burn?	Immune
Dizzy?	Immune
Stat down?	Normal
KO?	Immune
Experience	0
Coins	0 (0)
Item drop	--
Notice The second set of numbers next to the enemy's HP, POW, DEF, SPEED and Coins are stat increases from the Challenge Medal accessory; a 50% increase for HP, DEF, SPEED and Coins earned, and a 150% increase for POW.

Biffidus X are stronger versions of Biffidus that appear with Durmite X in the Challenge Node in the game Mario & Luigi: Bowser's Inside Story. One of their attacks consists of the Biffidus X trying to jab Mario or Luigi with its spear. Alternatively, Durmite will eat the Biffidus X and spit it back out at the Bros. They must jump over the flying Biffidus X in order to avoid taking damage.