Deranged scientist Dr. Eggman has devised yet another dastardly scheme. He's planning to build a Dr. Eggman empire by kidnapping animals and turning them into robots. This time, he's kidnapped Knuckles and Tails too!

Needless to say, the Sonic team is coming to straighten things out! Sonic, Knuckles, Tails, Amy Rose and newcomer Cream the Rabbit join forces to battle the nefarious Dr. Eggman.

Each character has unique abilities. Using strategy, quickness and brains, you'll plow through six zones en route to a showdown with the bad doctor in the Final Zone.

You can grow and play minigames with cute little creatures called Chao. You can transfer Chao to Sonic Adventure 2: Battle GCN via a Nintendo GameCube Game Boy Advance Cable. You can also link to Sonic Adventure DX: Director's Cut for Chao fun on the go.

Limited multiplayer action can be had with just one Game Pak, GBAs for every player and enough GBA Game Link Cables to connect all systems.

More advanced multiplayer action requires GBAs and Game Paks for every player and enough GBA Game Link Cables to connect all systems.