After 2 "adventures" in 3D land and one side-game (Sonic Shuffle), Sonic the Hedgehog and friends return to their 2D origins for another go at Eggman and his newest scheme. This game marks the first time a Sonic game has ever seen release on a Nintendo (handheld) console...and it surely won't be the last.
Dr. Eggman's up to his old tricks again! He's out to steal the Master Emerald to power his newest weapon. But Sonic and co. have discovered his treachery, and are hot on his heels. Join Sonic the Hedgehog, Mile "Tails" Prower, Knuckles the Echidna, and Amy Rose as they challenge Eggman in this all-new adventure. Re-discover old haunts and new dangers to find Eggman and stop his evil. Find the Chaos Emeralds and defeat the mad doctor before it's too late!