checked-part =>Dark Chao Garden: As a Dark Character (bad guy), raise a Dark Chao in the Chao Garden. Feed and train it until it evolves. After it evolves, a door to the Dark Chao Garden will appear in the Chao lobby. =>Hero Chao Garden: As a Hero character, raise a Hero Chao in the Chao Garden. Feed and train it until it evolves. After it evolves, a door to the Hero Chao Garden will appear in the Chao lobby. =>Boss Attack Mode: Complete either the Hero or Dark Story Modes to enable the Boss Attack mode for that side. ->Clear Pause: Hold Y+X when pausing for a clear picture. ->Extra Costumes/Karts: Complete all of a single character's missions to earn an alternate costume for that character in the two player mode and a secret kart in Kart Racing. =>Kart Racing: To enable Kart Racing, you must complete Tails's driving quest and Rouge's chase mission in the Story mode. =>Last Stage: To unlock the final stage, complete the Story Mode games for both the Hero and Dark sides. After you do so, a "Last Stage?" selection will appear in the Story Mode screen. =>Green Hill Zone: Earn 180 Emblems to unlock a 3D version of Green Hill Zone from the original Sonic the Hedgehog game. ->Earning "A" Rank: One way to get an A rank in a stage is to collect all the rings in it. Doing so will get you a PERFECT notice next to your ring count at the end of the stage, and you will receive an A ranking. ->Chao Toys: Win all 3 Crab Pool races for a Shovel. Win all 3 Stump Valley races for a Watering Can. Win all 3 Mushroom Forect races for a Toy Car. Win all 3 Block Canyon races for a Rattle.