Bonus courts - Play world tour mode and play a match on the Pringles, Holiday Inn, Sega, or Nintendo courts to unlock that same court in arcade mode. To access them, hold R when selecting arcade mode at the main menu.
Completion bonuses - Complete the following tasks to unlock the corresponding bonus:
Daytona USA costumes - Enter "DAYTONA" as a password to unlock Uniforms 107 and 108.
Fighting Vipers costumes - Enter "FVIPERS" as a password to unlock Uniforms 109 and 110; Hair 75; and Face 51.
Performance meter - While the announcer is saying the round number and team names in world tour mode, hold L + R. The meter assigns points based on how well you and your partner serve, toss, spike, etc.
Phantasy Star Online 2 costumes - Enter "PHANTA2" as a password to unlock Uniforms 114 and 115; Hair 77; and Face 53.
Play against Dural team - Get a overall first place ranking in world tour mode to play against the Dural team.
Sega costumes - Enter "OHTORII" as a password to unlock Uniforms 116 and 117.
Space Channel 5 costumes - Enter "ARAKATA" as a password to unlock Uniforms 111, 112, and 113; Hair 76; and Face 52.
Virtua Cops costumes - Enter "JUSTICE" as a password to unlock Uniforms 105 and 106; and Sunglasses 94.