Apparently you can only register a game once =(

Looking to trade unused codes of equal value:

Have following (20 pt codes)

5 DS Nintendogs Lab
2 DS Nintendogs Chihuahua
1 DS Nintendogs Dasch

Already registered:

WII Mario Party 8
WII Fire Emblem: Radiant Dawn
WII Play
WII Mario Kart Wii
DS Mystery Case Files: MillionHeir
DS Mario & Luigi: Bowser's Inside Story
DS Picross 3D
DS Nintendogs - Chihuahua & Friends
DS Brain Age: Train Your Brain in Minutes a Day
DS Brain Age 2: More Training in Minutes a Day
DS Nintendogs - Dachshund & Friends
DS Nintendogs - Labrador & Friends