Play against Master and King:
Successfully complete the game using no continues and without losing a
round under the normal difficulty setting to play against
Master in singles and Master and King in doubles in arcade mode.
This can be easily done if the match is set to one round.
Play as Master:
Defeat Master in singles matches in arcade mode.
Master may now be selected in arcade and training modes.
Play as King:
Unlock Master as a playable character.
Then, defeat Master and King in doubles matches in arcade mode.
King may now be selected in arcade and training modes.
Alternately, successfully complete all 22 trial and 24 training levels in world circuit mode.
Special costumes:
Complete the level 3 training missions in world circuit mode before the timer turns red.
In the last ten seconds of the challenge, the timer will turn red from yellow.
Complete it while it is still yellow and you will unlock special costumes.
Underarm serves:
Press A + X + Down at near court or A + X + Up while at far court.
GameShark-Codes
----------------
P1 Quick Win Do Not Use In Training Levels 900806E600000003
P1 Never Win Do Not Use In Training Levels 900806E600000000
P2 Quick Win Do Not Use In Training Levels EE37148500000003
P2 Never Win Do Not Use In Training Levels EE37148500000000
Infinite Funds A33B5C7100000090
All Characters CEB8E7E3C0705041
CEBAA7E3E06F1041
E0705041
All Levels 515477E8C0705041
515637E8E070F041
E0705041