Knuckles the Echidna is a red anthropomorphic echidna character in Sega's Sonic the Hedgehog series of video games. He is the type of character who is determined and serious but sometimes gullible. He can glide and climb up walls and is a powerful fighter due to his spiked hands. In the Sega cannon, he serves as the guardian of the Master Emerald, a huge gemstone that controls the series' integral Chaos Emeralds. Once an antagonist, he learned about what Eggman was trying to do, and is now on Sonic's team.
He has appeared in a few of SMG4's bloopers. However, they were only either minor roles or cameo appearances. He has only appeared in the Sonic the Derphog series, with the exception of SM64: Retarded Recap 2015.