Board

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.

Contributed By: Saturn Urameshi.

Avatar Awards

Contributed By: Guard Master.

Bonus Video

To unlock the Bonus Video in the Help & Options section, play the game for five hours in any combination of modes.

Contributed By: TheDoc91385.

Achievements

Contributed By: Guard Master.

1P Kart Race

Beat Route 101 or Route 280 to open 1 Player Kart Race.

Contributed By: ruhztee.

2P Kart Race

Beat either Kart Race Action Stage (Route 101 or Route 280), then beat the other to open 2 Player Kart Race.

Contributed By: ruhztee.

All Boss Attack

To unlock the All Boss Attack, you must of completed the Hero Story, Dark Story and the Last Story, it will appear in the 1 player menu, The All Boss attack is a time attack where you face all the bosses from the Hero Story, then Dark Story then finally the Last Story in succession with no breaks.

Contributed By: Dark_Shadnic1.

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.

Contributed By: MrDeePay.

Chao Hat

To get a hat for your chao go into a garden as Knuckles or Rouge and dig around untill you find one.

Contributed By: sonic2.

Clean Pause

Pause the game and hold X + Y to clear the game of the pause screen. This only works on controller A.

Contributed By: NTsui.

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.

Contributed By: ruhztee.

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.

Contributed By: TapamN.

Hero Boss Attack

Beat the game with the Hero 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 Hero Side.

Contributed By: ruhztee.

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.

Contributed By: spiral_bomb.

More Chao Gardens

Raise a Hero Chao to unlock the Hero Garden. Raise a Dark Chao to unlock the Dark Garden.

Contributed By: TapamN.

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.

Contributed By: ruhztee.

New Looks

Beat ALL of a character's missions to get a new look in 2 Player VS Mode.

Contributed By: TapamN.

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.

Contributed By: ruhztee.

Phantasy Star Online Costumes

For Sonic, successfully complete all of his missions (not including ''Cannon's Core''). You will receice a message saying that you have completed all of Sonic's missions and that you have also unlocked a secret costume. Go to versus mode, select your stage or versus type, but before that press right and you will see a diffrent picture of Sonic. Once the versus mode begins sonic's costume will look like the red HUmar from Phantasy Star Online. The code is the same for Shadow, except his costume is a red HUcast.

Contributed By: GUndamX20.

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.

Contributed By: NTsui.

Unlock Diamond & Onyx Chao Races

Win at least one race from each of the Aquamarine, Garnet, Peridot, and Topaz Chao Races to unlock the Onyx & Diamond Chao Races.

Contributed By: MrDeePay.

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.

Contributed By: NTsui.

Unlock Green Hill

To unlock a 3D version of Green Hill, you must collect all 180 emblems in the game.

Contributed By: MrDeePay.

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.

Contributed By: MrDeePay.

Win a Chao TV

To get the Chao TV, win the 12th race in the Challange Races. You will find a little TV for your Chao in the Chao Garden.

Contributed By: TapamN.

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.

Contributed By: MrDeePay.

Win a Rocking Horse

To get a rocking horse for your Chao, you must win Hero Race No.4, the 'Devil vs. Angel' race. Once you do this, you'll get a rocking horse for your Chao in the Hero Garden.

Contributed By: MrDeePay.

Win Chao Ball

To win the Chao ball, you must beat Challange Race #4 in the Chao Races, the ''Small Animal'' race. If you come in first place, you will win a ball for your Chao, and an emblem. You will find the ball in the Chao Garden.

Contributed By: TapamN.

Win Chao Ball for Dark Garden

To win the Chao Ball for the Dark Garden, come in first place in the second Dark Race. You will find a new, creepy looking Chao Ball in the Dark Garden.

Contributed By: TapamN.