Players King and Queen:
Hold L and press Up, Down, Up, Down, Square, Triangle, Square at the main menu.

All stadiums:
Hold L and press Up, Down, Left, Right, Square(3) at the main menu.

All racquets and outfits:
Hold L and press Right, Left, Right(2), Up(3) at the main menu.

Start with $1,000,000 in World Tour mode:
Hold L and press Up, Down, Left, Down, Triangle(3) at the main menu.

$2,000 per week in World Tour mode:
Hold L and press Up, Down, Right, Down, Triangle, Square, Triangle at the main menu.

Sepia graphics:
Hold L and press Up, Down, Left, Right, Left(3) at the main menu in the European version of the game.

Play against The Master:
Do not lose any rounds in arcade mode under the normal difficulty setting. The Master will be your final opponent. Note: In doubles, your final opponents will be the Master and King.

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
Complete the following in-games 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