Unlocking Boards/Scooters/Sneakers:

Darkness (Shadow's Sneakers) Beat Hero Story
Skate type (Shadow's Sneakers) Beat Hero Story
Blue Star II (Sonic's Board) Beat Babylon Story
Egg-Rider (Eggman's Scooter) Beat Babylon Story
Magic Carpet Beat Babylon Story
Bike type (Different Styles of Boards/Scooters) Beat Babylon Story