If you mean for your flashcard. I can recommend a crapload of games. If it's for actually buying. The list decreases. Some games are fun, but not all are worth your money. Anyway, here comes the list. Games in bold are the ones I would actually buy if I didn't have a flashcard. However, I'm very picky with money.
[title:List of Games]
Advance Wars: Days of Ruin (Advance Wars: Dark Conflict in EU)
Advance Wars: Dual Strike
Animal Crossing: Wild World
Bleach: The Blade of Fate
Bomberman Land Touch
Castlevania: Dawn of Sorrow
Castlevania: Portrait of Ruin
Contra 4
Dementium: The Ward
Draglade
Dragon Quest Heroes: Rocket Slime
Dragon Quest Monsters: Joker
Elite Beat Agents
Final Fantasy Fables: Chocobo Tales
Final Fantasy XII: Revenant Wings
Geometry Wars: Galaxies
Izuna: Legend of the Unemployed Ninja
Jump Super Stars (J)
Jump Ultimate Stars (J)
Kirby Canvas Curse (Kirby Power Paintbrush in EU)
Kirby Squeak Squad (Kirby Mouse Attack in EU)
Legend of Zelda: Phantom Hourglass
Luminous Arc
Magical Starsign
Mario Kart DS
Mario Party DS
Mario Hoops 3 on 3 (Mario Slam Basketball in EU)
MegaMan Star Force: Dragon / Leo / Pegasus
MegaMan ZX
MegaMan ZX Advent
Metroid Prime: Hunters
New! Super Mario Bros.
Phoenix Wright: Ace Attorney
Phoenix Wright: Justice For All
Phoenix Wright: Trials & Tribulations
Pokemon Mystery Dungeon: Blue Rescue Team
Pokemon Diamond / Pearl
Pokemon Ranger
Resident Evil: Deadly Silence
Rune Factory: A Fantasy Harvest Moon
Sonic Rush
Sonic Rush Adventure
Super Mario 64 DS
Trauma Center: Under The Knife
Worms Open Warfare 2