Let’s see. On my r4ds (which is what holds all my games in one cartridge) I have…
Avalon Code
Big Brain Academy
Contact
Drawn To Life
Final Fantasy – Crystal Chronicles: Ring of Fates
Final Fantasy – Crystal Chronicles: Echos of Time
Final Fantasy III
Final Fantasy IV
Harvest Moon
Harvest Moon Cute
Lego Batman
MySims
Ninjatown
Phoenix Wright – Ace Attorney
Nintendogs
Professor Layton and the Curious Village
Summon Night: Twin Age
Tetris DS
and Zenses Ocean.
Not to mention I have Super Mario Bros, Pokemon Diamond, and Super Princess Peach as well.