Shrooblet

A Shrooblet is a small, baby, purple, Goomba-like Shroob with light-blue spots that can be found near Hollijolli Village in the game Mario & Luigi: Partners in Time. They attack by spinning into Mario or Luigi. The attack can be countered by a jump. If a Shrooblet lifts its right foot before attacking, it will twirl into Mario; if a Shrooblet lifts its left foot before attacking, it will spin into Luigi.

Luigi gets hit on the head by a Shrooblet as Stuffwell teaches the player how to heal in the overworld. Regardless of how much HP Luigi had at the time, he will always be on 1 after the Shrooblet hits him.