After settling in Green Hill Zone, Sonic is eager to prove he has what it takes to be a true hero. His test comes when Dr. Robotnik returns, this time with a partner, Knuckles, To Stop Army of Badniks, in search for an emerald that has the power to destroy Badinks. Sonic teams up with his Freedom Fighters, and together they embark on a globe-trotting journey to find the emerald before it falls into the wrong hands.
