Sonic Adventure 2 Cheats - PC
First, have two controllers plugged in. In Sonic's second stage (Metal Harbour), press [Y] in the second controller at any time. Sonic'll get a board under his shoes and will be able to street board the level with it! However, you can't complete the stage with this board.
Reuse an Animal Multiple Tines in a Chao Garden
While holding your animal, go as close to your chao as possible without giving it to the chao. Then simply drop the animal in front of your Chao. If done correctly the chao will give the same animation as if you handed the animal to the chao, only you can pick the animal up again. This can also be done with chaos drives.
Unlock Playable Characters
Follow the guidelines below to be able to play as those characters in versus mode:
Play as a Chao - Beat all of Tails' levels with an A rank
Play as Amy - Beat all of Sonic's levels with an A rank
Play as Big - Get A ranks on all of Eggman's Stage
Play as Chaos 0 - Beat all of Rouge's levels with an A rank
Play as Mecha Sonic - Beat all of Shadow's levels with an A rank
Play as Tikal - Beat all of Knuckles' levels with an A rank
2P Kart Race
Beat either Kart Race Action Stage (Route 101 or Route 280), then beat the other to open 2 Player Kart Race.
Alternate Way for an 'A' Ranking
Complete a level with every ring collected. If you do this, you should get a 'Perfect' stamp on the Ring Count when you complete the level and a guaranteed 'A' rank.
To get a hat for your chao go into a garden as Knuckles or Rouge and dig around untill you find one.
Pause the game and hold [X] + [Y] to clear the game of the pause screen. This only works on controller A.
Dark Boss Attack
Beat the game with the Dark Side to unlock Boss Attack in 1P Play. Boss Attack is basically a Time Attack to see how quickly you can beat all bosses on the Dark Side.
Hero and Dark Races
Unlock the Hero Garden, the Dark Garden, and beat the all Beginner's Races to unlock two special race modes, Hero Race and Dark Race.
Keep Upgrades Without Finishing Levels
After getting your upgrade exit the level. After leaving the level go to stage select and go to any level that is easy and quick for you complete. After completing the level the game saves your upgrade.
More Chao Gardens
Raise a Hero Chao to unlock the Hero Garden. Raise a Dark Chao to unlock the Dark Garden.
New Chao Races
Beat all 3 levels of the 4 Beginner Races (Crab Pool, Stump Valley, Mushroom Forest, and Block Canyon) to open Jewel Race and Challenge Race.
New Toys for Chaos
1. Beat the 3 Crab Pool Races to win a shovel.
2. Beat the 3 Stump Valley Races to win an elephant watering can.
3. Beat the 3 Mushroom Forest Races to win a rattle.
4. Beat the 3 Block Canyon Races to win a toy car.
Unlock Boss Mode
Beat the Hero Side or Dark Side to access Boss Mode as the the side you beat. It will appear under 1-Player Mode and allows you to fight all the bosses from that side in order.
Unlock Final Stage
To unlock the Final Stage, Cannon's Core, first beat the Hero and Dark Sides in 1-Player Story Mode. Then the Last Side option will be available in Story Mode.
Win a Chao Radio
To get a raido for your Chao, complete the 4th Dark Race, the 'Angel vs. Devil' race. Once you do this, you should find a radio for your Chao in the Dark Garden.
Win a jack-in-the-box
To get this toy for your Chao, win the 'Pumpkin Group' race. (Challenge Race No.8) After you do this, you'll find a jack-in-the-box in the Chao Garden.