The free pattern is available online.

Toxic Wastelings and Disgusting Oozelings are in-game companion pets in WoW (World of Warcraft); however, this pattern could also be easily adapted to become a Brain Slug from the show Futurama. The oozeling pictured was made for the 2010 WoW Swap on Craftster.org. Enjoy!

Materials: yarn, crochet hook, stuffing, yarn needle
Disgusting Oozeling is approximately 2 inches tall.