Below are the codes I am missing as of 02 July 2006.

Custom Robo

Classic NES Series: Bomberman

Classic NES Series: Excitebike

Mario Party 5

Classic NES Series: Metroid

Kirby & The Amazing Mirror

GBA Video: Pokémon - I Choose You

GBA Video: Pokémon - Beach Blank-Out Blastoise

GBA Video: Pokémon - Johto Photo Finish

Mario Party Advance

Pokémon Colosseum

Pokémon Dash

Fire Emblem: The Sacred Stones

Dynasty Warriors Advance

Battalion Wars

Donkey Kong Country 2

Donkey Kong Country 3

Mario Tennis: Power Tour

Mario Party 7

Pokémon XD: Gale of Darkness

Fire Emblem: Path of Radiance

Hamtaro: Ham-Ham Games

Classic NES Series: Donkey Kong

Classic NES Series: Pac-Man

Classic NES Series: Xevious

Pokémon Emerald

Nintendogs - Best Friends Edition

Nintendogs - Chihuahua & Friends

Nintendogs - Dachshund & Friends

True Swing Golf

Chibi-Robo

Super Mario Strikers

Tales of Phantasia

Mario Superstar Baseball

F-Zero: GP Legend

Metroid Prime Hunters

Star Fox: Assault

Sudoku Gridmaster

Brain Age: Train Your Brain in Minutes a Day!

Magnetica

Nintendo DS Lite