Virtua Tennis: World Tour cheats and cheat codes for Sony PSP

Press the following button combinations in the main menu:

Unlock Players King and Queen:
Hold L and press Up, Down, Up, Down, Square, Triangle, Square

Unlock All stadiums:
Hold L and press Up, Down, Left, Right, Square(3x)

Unlock racquets and outfits:
Hold L and press Right, Left, Right(2x), Up(3x)

Begin with $1000000 in World Tour mode: 
Hold L and press Up, Down, Left, Down, Triangle(3x)

$2000/week in World Tour mode:
Hold L and press Up, Down, Right, Down, Triangle, Square, Triangle

Turn on Sepia graphics:
Hold L and press Up, Down, Left, Right, Left(3x)
(European version)

Unlock King: 
Win against King in Singles, Doubles or Mixed Doubles on Tournament Mode 

Unlock Queen: 
Win against Queen in Singles, Doubles or Mixed Doubles on Tournament Mode 

Unlock gear in World Tour mode
Finish the next in-game tasks:

Alien Force Racket - Finish Alien Force numerously on level four 
Bulls Eye Racket - Reach more than 12000 score on Bulls Eye 
Danger Flag Racket - Collect all flags without getting hit on Danger Flags 
Pin Crasher Racket - Score 150 points on Pin Crasher 
Prize Sniper Raquet - Collect more than 10000 points on Prize Sniper 
Stomper Racket - Collect all 125 cans in Stomper Training 
Tank Attack Racket - Win tank attack with more seven seconds or more left 

King of the Court Stadium:
Beat King and Queen in the Super Exhibition

Unlock Prize Sniper racquet:
Reach 10K points in Prize Sniper