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.
Unlock the following skins by performing the corresponding tasks:
SKIN - HOW TO UNLOCK Knuckles - Complete Story mode with Knuckles. Metal Sonic - Complete Story mode with Metal Sonic. Shadow - Complete Story mode with Shadow. Silver - Complete Story mode with Silver. Sonic - Complete Story mode with Sonic.
Unlock the following Cup Circuit mode cups by beating the easy, medium, and hard challenges in the corresponding zones in Challenge mode:
CUP - ZONE Blue Chaos Cup - Death Yard Zone Cyan Chaos Cup - Colosseum Highway Zone Green Chaos Cup - Forest Falls Zone Grey Chaos Cup - Complete every challenge in the game Purple Chaos Cup - Meteor Base Zone Red Chaos Cup - Sky Park Zone Yellow Chaos Cup - Crystal Mountain Zone
Unlock the following secret forms by performing the corresponding tasks:
SECRET FORM - HOW TO UNLOCK Chaos Zero - Get every card in the game. Metal Sonic (2nd form) - Complete Metal Sonic's storyline, and get the Metal Madness, Metal Overlord, and Neo Metal Sonic cards. Super Shadow - Unlock all of Shadow's suits, complete his storyline, and beat all of the challenges as Shadow. Super Silver - Unlock all of Silver's suits, complete his storyline, and beat all of the challenges as Silver. Super Sonic - Unlock all of Sonic's suits, complete his storyline, and beat all of the challenges as Sonic. Tikal - Unlock all of Knuckle’s suits, complete his storyline, and beat all of the Colosseum Highway challenges as Knuckles.