- Silver's leather shoes
To get Silver's leather shoes, get the Chaos 2 (1998), Chaos 4 (1998), and Chaos 6 (1998) cards.

- Knuckles' leather shoes
To get Knuckles' leather shoes, get the Buzzer 2002, Coconut 2002, and Turtloids 2002 cards.

- Metal Sonic
Successfully complete the game with Sonic, Knuckles, Silver, and Shadow to unlock Metal Sonic. Alternately, collect the 'Metal Madness', 'Metal Overlord', and 'Neo Metal Sonic' cards.

- Sonic's ice suit
To get Sonic's ice suit, get the Miles 'Tails' Power 2002, 2004, and 2005 cards.

- Sonic's leather costume
To unlock Sonic's leather suit, get the Sonic The Hedgehog, Sonic The Hedgehog 2, and Sonic The Hedgehog 3 cards. To unlock the gloves, get the Cream The Rabbit, Cheese, and Cream and Cheese cards. To unlock the shoes, get the Sonic and Amy, Amy Rose 2004, and Amy Rose 2005 cards.

- Cup Circuit mode cups
Successfully complete the easy, medium, and hard challenges in the indicated zone in Challenge mode to unlock the corresponding Cup Circuit mode cup:

Grey Chaos Cup	Finish every challenge in the game
Red Chaos Cup	Sky Park Zone
Purple Chaos Cup	Meteor Base Zone
Cyan Chaos Cup	Colosseum Highway Zone
Blue Chaos Cup	Death Yard Zone
Green Chaos Cup	Forest Falls Zone
Yellow Chaos Cup	Crystal Mountain Zone

- Skins
Successfully complete the indicated task to unlock the corresponding character skin:

Shadow	Successfully complete Story mode with Shadow.
Silver	Successfully complete Story mode with Silver.
Knuckles	Successfully complete Story mode with Knuckles.
Metal Sonic	Successfully complete Story mode with Metal Sonic.
Sonic	Successfully complete Story mode with Sonic.

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