Speed Punks [PSX]

Instant Turbo Blast
I the middle of a game, press and hold the Accelerator and Brake buttons. Now turn yourself around twice, so that you have completed to full 360s, then let go of the Accelerator and Brake buttons.

Race as Cosworth:
Finish in first place in all races in the easy tournament. Then, defeat Cosworth at Millennium Park.

Race as Tetsuo:
Finish in first place in all races in the medium tournament. Then, defeat Tetsuo at City One.

Race as Beamer:
Finish in first place in all races in the hard tournament.

Easy turbo:
Hold the brakes and accelerate at the same time. The kart should just stay in the same location. When you release the brakes the turbo will automatically activate.

Full turbo bar:
Hold the brakes and accelerate at the same time, do two 360s, then release brakes to get a full turbo bar.

Quick start:
Hold Square until the green light disappears, then hold X.

Unlimited weapons:
Collect a machine gun, missile, bomb or other weapon power-up, but do not use it in the current race. Finish the race in first place. You will have unlimited use of that weapon during the next race.