With Knuckles the Echidna once again playable in Sonic Superstars, it may be worthwhile to look back at Rad Red's other appearances in recent games.

Knuckles the Echidna is a great friend to Sonic the Hedgehog, and he appears as a playable character in a variety of the best Sonic games.

Sonic the Hedgehog 3 made for a terrific film with Shadow's introduction, but it still fell short of expanding on Tails and Knuckles's characters.