Crazy Taxi 2 Codes
     Use the following key combinations while selecting your character
in Crazy Taxi 2:

Hold Triangle + Start while selecting your character: Expert Mode 
Hold Start while selecting your character: No arrows 
Hold Triangle while selecting your charcter: No destination marks

Crazy Taxi 1 Codes

Another day (Start in a new location and new fare locations)
     Press R once, then press and hold R while selecting a character

Drive the taxi bike (without having to beat Crazy Box)
     Hit L+R 3 times (rapidly) at the character select screen

Expert mode
     Press and hold L + R + Start while the character selection screen
is loading

No arrows
     Hold R and Start while the character selection screen is loading

No destination marks
     Hold L and Start while the character selection screen is loading

Hints:

Crazy Blur
     Earn  a  Class C License or better on any map in any time mode of
Crazy Taxi 1 or Crazy Taxi 2.

Crazy Interview
     Watch  an  interview with the producer of the original crazy taxi
game.  To  unlock,  complete to final mini game in either Crazy Taxi -
Crazy Box or Crazy Taxi 2 - Crazy Pyramid.

Crazy Pickup
     Earn  a  Class S License or better on any map in any time mode of
Crazy Taxi 1 or Crazy Taxi 2.