Hungry Boo as seen in Gourmet Boo.]] Hungry Boo is an enemy exclusive to Brutal Mario. The only level it appears in is Gourmet Boo. The Hungry Boo is a Boo who follows Mario, so Mario can't jump into him. It also can eat other Boos or even Bubbles by touching them. However, when Hungry Boo does not eat enough and turns red, he will fly towards Mario and causes Mario to die (even if you're not small Mario)

Hungry Boo Sprite

Hungry Boo's sprite