Being the Guardian of the Master Emerald can be hard work. You need energy at the ready! Introducing a new G FUEL flavor in our 16 oz Cans – inspired by the powerful friend of Sonic, Knuckles the Echidna! G FUEL teams up with SEGA® of America Inc. once more to bring fans Knuckles Sour Power! This super-charged SOUR punch of Raspberry straight from the spiked hands of this mighty hero! Grab your G FUEL Knuckles Sour Power to help you get the energy you need to beat Dr. Eggman or play games with your friends all night, without the need for the Chaos Emeralds!