NDS Games

Tell me, what are some good and worthy DS games?

Right now, I have only Super Mario DS, sort of fun but, getting old.

Guide me /games/.

Thanks for the list  of titles Anonymous. :)

Oh, hey, anyone tried "Trace Memory?" I've been thinking of getting it also, but I don't want to risk getting a crappy game.
No one rents DS games, they're all too busy renting for boring ol' PSP. :|