Oh good lord I have a ton... o.o Well let's just start with DS games first that I actually have and haven't lost:
-Mario Party DS (my first DS game!)
-Pokemon Black
-Tamagotchi Corner Shop 3
-Kirby SuperStar Ultra
-The Legendary Starfy (Stuck on the obsticle course >.<
-Pokemon White 2
-Club Penguin Elite Penguin Force (somewhere that is..)
-Ultimate Band
Now onto 3DS games:
-Animal Crossing New Leaf
-Pokemon Rumble Blast
-Adventure Time
-The Sims 3
-Lego Harry Potter Years 5-7
-Super Mario 3D Land
-Skylanders: Spyros Adventure
..and that's all I think. The rest of my DS and 1 3DS game where either missing or stolen.
Games I want:
Mario and Sonic at the 2012 Olimpic Games (If there's Mii support like Wii that is)
Moshi Monsters Moshlings Theme Park thing
Lego City Undercover for Wii U