I have it all listed here (you need to scroll down), but I'm just gonna copy and paste it here for your convenience. I will update this entry and the profile as new games come into my possession. Contact me if you wish to be added to my friend rosters.

11/11/09 UPDATE:
-Phantasy Star Zero friend code added to RPG/Fighting Games

Wii
Wii Console Code: 6788-1406-6143-2223

Super Smash Bros. Brawl
Code: 4682-8113-0355

Nintendo DS
Racing Games:
Mario Kart DS
Code:
403786
949580
Name: Gospel (it has to do with my emblem XD)

Diddy Kong Racing DS
Code:
055926
092931
Name: Zai

Puzzle Games:
Planet Puzzle League
Code:
292159
516330

Shooter Games:
Star Fox Command
Code:
553-668
697-860

Platform/Adventure Games:
Sonic Rush Adventure
Code:
274989
105667

The Legend of Zelda: Phantom Hourglass
Code: 4081-3756-5345
Name: Zai

RPG/Fighting Games:
Phantasy Star Zero
Name: Zai
Code: 4898-6033-3661

Pokemon Diamond
Name: Michael
Code: 5197-8891-1357

MegaMan Star Force: Dragon
Code: 4381-9414-3226

MegaMan Star Force 2: Zerker x Ninja
Code: 3394-4980-3259 (Ninja)

Jump Ultimate Stars
Code: 2277-3926-7771

Non-Competitve Games:
Animal Crossing: Wild World
Code: 2835-2949-6346
Name: Zai
Town: Llayanon