Super Knuckles

Super Knuckles is a transformation of Knuckles the Echidna, when collecting 7 Chaos Emeralds.

History
Super Knuckles appeared as the Power Type member of Team Super Sonic. When Metal Overlord took off, Sonic transformed into Super Sonic and shared his chaos energy with Him and Super Tails, allowing them to achieve their own Super States and go after Metal Overlord together. With the power of teamwork, Team Super Sonic defeated Metal Overlord.