Become the last guardian of the Master Emerald and wear this Knuckles Sonic the Hedgehog Kids Costume this Halloween. Knuckles is a powerful red echidna who must try to prevent Sonic and Tails from stealing the Emeralds. The outfit features a full body red jumpsuit with an attached tail, as well as a pair of green boot tops and a red dreadlock headpiece. The chest of the jumpsuit has a white crescent design, and the wrist cuffs are also white. You can accessorize this costume with some of the items that are sold separately on our site, such as a pair of white gloves, a pair of black shoes, and maybe even a bag for your Halloween candy. Get a friend to dress up as Sonic and make this part of a fun group outfit!