Smash Tennis (SNES)
CheatingDome.com
Australian Open
Press X, A, B, A, Y, A, Y, A.
Play American Open
Press X, B, A(2), Y, A, X, A.
Play Asian Open
Press A, Y, A(2), Y, X, Y, A.
Play European Open
Press A, X, B, A, Y, X, A(2).