Tetris Custom v1 released by TheDrev.

This is yet another Tetris, but you can put your own sounds and graphics by editing the res/tetris.xml file. The Default skins are Keithris featuring Talking Classics' Keith Apicary (Screw Attack), and a classic skin named Russia.

Adding a skin
Edit the tetris.xml file and add images and sounds in a subdir of the res directory. the skin directory's name must be in uppercase.

http://wiibrew.org/wiki/Tetris_Custom