The following are known Gecko Codes for Donkey Kong Country Returns on Nintendo Wii (Wii).

1-2 Player Moon Jump v.2 (Press B+2) [Thomas83Lin]
F6000001 80008100
3860FFFF 2C000001
D2000000 00000009
3D808000 2C000001
41820010 2C000002
41820028 4800002C
618C18A2 A18C0000
718C0500 2C0C0500
40820018 3D804503
91830184 4800000C
618C18A6 4BFFFFE0
3860FFFF 00000000
E0000000 80008000
F6000001 80008100
90030000 552A043E
D2000000 00000005
3D408000 614A18A0
2C190000 40820008
900A0000 2C190001
40820008 900A0004
90030000 00000000
E0000000 E0008000
*Wiimote Horizontal*

Invincibility [Thomas83Lin]
F6000001 80008100
FC021840 4C810020
14000004 4800009C
140000A0 38800001
E0000000 E0008000
*Used wiiztec's code for a starting point*
*Works on Rambi also*

Longer Lasting Diddy Rocket [Thomas83Lin]
F6000001 80008100
D01A0140 C3DC019C
14000000 60000000
E0000000 E0008000

Consistent Roll without diddy [Thomas83Lin]
F6000001 80008100
80660028 7C032840
14000008 60000000
E0000000 E0008000