Treevil (Mario)

Treevil appeared in 2009 video game called Mario & Luigi: Bowser's Inside Story. Treevil is a walking tree enemy found in Mario & Luigi: Bowser's Inside Story. Their name is a portmanteau of "tree" and "evil". They can be encountered in Dimble Wood. It appears in two forms, one with sad glowing blue eyes and one with malicious red eyes, the latter holding an acorn on its branches; these Treevils are stronger. To attack, a Treevil throws twigs at the character. While playing as Bowser, Treevil will either lob the twig high into the air, forcing Bowser to use his shell defense, or throw it so it bounces along the ground, forcing Bowser to counter it with a punch. If a Treevil has an acorn, Bowser can inhale it using his Vacuum attack to restore 20 HP. When Mario and Luigi encounter a Treevil, it attacks in the same way, but the Bros. must counter the twigs with their hammers. The stats increasing with the berry is similar to Pidgits from the previous game.

Bowser can use the Vacuum Block to inhale a Blitty from Treevils. In addition, a Treevil is used in a tutorial by Broque Monsieur that explains how to acquire Blitties.

After Bowser frees his Goomba corps in Dimble Wood, a Fawfulcopter appears to inform Bowser that Fawful has kidnapped his other minions before releasing two Treevils in an attempt to slow Bowser down from reaching his castle. This makes Treevils one of the few enemies in the game that is mandatory for Bowser to fight.

In Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey, they no longer chase Mario and Luigi in the overworld. If they are fought though, one with a berry and one without a berry will always be encountered. They also appear in the Bowser Jr.'s Journey mode as enemies. They are ranged troopers, and are weak to fire attacks from Fire Bros. and Fire Stalking Piranha Plants.