At the Main menu choose 'Password' and enter any of the following codes to unlock the corresponding

Unlock Dracles (Money):
8, 9, 7, 10, 5, 13, 999,999

Draculim Bars are replaced by sushi in All City Race/Free Run:
7, 8, 13, 12, 10, 10

Get Blue Energy Bolt Gear:
9, 2, 13, 8, 1, 12

Get Green Charging Gear:
5, 12, 13, 5, 8, 11

Unlock Shadow Booster and Shadow Dragon:
2, 5, 4, 11, 6, 2

Unlock Dragon Booster and Legendary Beau:
12, 6, 12, 10, 13, 3

Unlock Skills Competition vs. Wulph
13, 9, 8, 12, 10, 1

Unlock Dragon-Human Duel vs. Reepyr
1, 9, 3, 6, 5, 2

Sprint Meter can't be recharged
1, 7, 5, 3, 2, 11

Unlock Unlimited Sprint Meter:
9, 13, 6, 5, 5, 12

Take Super Damage from obstacles and opponents in All City Race/Free Run
11, 11, 11, 11, 11, 11