Grulches were little creatures found on the facilities high above Smolg. They were purple, and crawled on multiple limbs. Their large set of teeth gave them the ability to inflict serious pain on intruders. They could be considered dangerous in swarms, even though it only took a single swing from the wrench to kill them. The Grulches were also said to be smaller cousins of the Two-Headed Smolgian Snapper; however, having only one head. When killed, they would usually roll some metres away.
- Interestingly, when a Grulch tried to bite Ratchet, its mouth opened up, instead of really biting.
- Ratchet & Clank: Going Commando (first appearance)