Tennis Arena Cheats
PS1 | Submitted by GamesRadarBonus Characters and Court
At the smart dog logo screen press Up, Down, Left, Right, Start. If you completed the code correctly a sound of a cheer will confirm your entry. Additional characters and the Canyon court will be available in Smash Tennis mode.
PS1 | Submitted by GamesRadarSuper Backhand
Hold R1 + R2 and press X, Square, Circle, Square, X, Triangle. Release R1 + R2, then press Select.