Defeat King and Queen (mixed double) level 5 in world tour mode to unlock King's Court. This level 5 will only be available if you won the mixed double match in level 4. Both matches will be in December.
Game Shark Codes
Master Code (Must Be On) 0E3C7DF2 1853E59EEE8E8476 BCD4B0B2
Infinite Money DE902A26 C19E7B82
Infinite Stamina Male DE9029BE BCA99B8A
Infinite Stamina Female DE9029BA BCA99B8A
All Raquets DEA3E182 BCA99BC2
All Apparel DEA3E2EA BCA99BC2DEA3E2F6 BCA99B8A
All Etc. DEA3E186 BCA9A786
All Stages DEA3E1FA BCA99B92
1 Point to Win P1 [Note] CEB9B4AE BCA99B86
Never Win P1 [Note] CEB9B4AE BCA99B83
1 Point To Win P2 [Note] CEB9B4AA BCA99B86
Never Win P2 [Note] CEB9B4AA BCA99B83
Note: Only use this code in competitions, not in training mode.