Introducing a new G FUEL flavor inspired by the powerful friend of Sonic, Knuckles the Echidna! G FUEL teams up with SEGA® of America Inc. once more to bring fans yet another exciting new flavor: G FUEL Knuckles Sour Power! You’ll have to go fast to catch this limited-edition G FUEL Collector’s Box! Fans will love this mighty SOUR punch of Raspberry straight from the spiked hands of the Guardian of the Master Emerald! Grab your G FUEL Knuckles Sour Power Collector’s Box to help you get the energy you need to glide, climb, fight and beat Dr. Eggman at his own game!