A Snoozorb is a large presumably robotic being used by the Shroobs as guards in Shroob Castle during the events of Mario & Luigi: Partners in Time. Usually Snoozorbs are found lazing around instead of doing their job, but if the Bros. approach them, they will wake up and attack. Snoozorbs attack by either shooting a laser beam or changing into a ball shape and rolling into the Bros. Unlike other enemies, Snoozorbs give two hints on how they attack. First, they will blow some steam. If the steam comes out of the right side of the Snoozorb's head, it will attack Mario and if the steam comes out of the left side, it's targeting Luigi.
Now, if the Snoozorb does its rolling attack, it will roll toward the appropriate brother, who must Hammer the enemy away. But if the Snoozorb is planning on firing a laser, it will charge up, gathering energy into its mouth. If the energy goes straight in, Mario or Luigi must Jump to avoid the attack. If it spirals, however, the attack will pass harmlessly overhead.
After Snoozorbs have taken enough damage, they will start attacking multiple times in a single turn.