The following are known Gecko Codes for Grand Slam Tennis on Nintendo Wii (Wii).

CPU Score 0 (1 Button) [ZiT]
28B9B840 FDFF0200
C29B09CC 00000005
81E40004 2C0F0000
41820010 39E00000
90040010 4800000C
39E00000 91E40010
60000000 00000000
C29B5F54 00000005
81E40004 2C0F0000
41820010 39E00000
90040010 4800000C
39E00000 91E40010
60000000 00000000
C29B3344 00000005
81E40004 2C0F0000
41820010 39E00000
90040010 4800000C
39E00000 91E40010
60000000 00000000
C29AAD60 00000005
81E50004 2C0F0002
41820010 39E00000
90040010 4800000C
39E00000 91E40010
60000000 00000000
C29B7074 00000005
81E40004 2C0F0002
41820010 9004000C
39E00000 4800000C
39E00000 91E4000C
60000000 00000000
C29B29B8 00000005
81E40008 2C0F0003
41820010 39E00000
91E4000C 4800000C
9004000C 39E00000
60000000 00000000
040D5C68 88060000
E0000000 80008000

Player Match Point (2 Button) [ZiT]
28B9B840 FEFF0100
C29B09CC 00000004
81E40004 2C0F0000
41820010 38000003
90040010 91C40020
39E00000 00000000
C29B5F54 00000004
81E40004 2C0F0000
41820010 38000003
90040010 91C40020
39E00000 00000000
C29B3344 00000004
81E40004 2C0F0000
41820010 38000003
90040010 91C40020
39E00000 00000000
C29AAD60 00000004
81E50004 2C0F0002
41820010 38000003
90050010 90050020
39E00000 00000000
C29B29B8 00000004
81E40008 2C0F0003
41820008 4800000C
38000063 9004000C
39E00000 00000000
C29B29B8 00000004
81E40018 2C0F0000
41820008 4800000C
38000063 9004000C
39E00000 00000000
040D5C7C 88060001
E0000000 80008000