Enter Cheats at Menu Selection Screen:

U L R D = Up Down Left or Right on dpad (or joystick)

Cheats:

l & r = Left & right bumpers
B = B button

"UUDDLRLR" - Unlock all courts
"UUDDLRlr" - Unlock King & Duke
"LRBLRBUD" - Unlock all gear
"BLBRBUBD" - Test end sequence; win one match to win tournament

Chime is made if entered correctly.