Bruce Lee: Quest of the Dragon Cheats
Enter the following at the "Press Start" screen.
Code: X, Y, X, Y, X, X, Y, Y, click Left Analog-stick, Right Analog-stick
After finishing the game, you can play it over again in a more difficult Hard mode and you will keep everything you acquired the first time around (power-ups, etc).
After finishing the game you will unlock Bruce's Challenges and Hard mode.
When you are beating up your oppenents they will either give you coins or drop a pepsi can. If you take the Pepsi can your punches/kicks will be two to three times more effective.