NO. Do not even joke. I can see letting go of MKDS but Animal Crossing...no...your DS will weep if you sell it now. It'll never adjust to its new owner and five years down the line you'll pass it on the street barely recognizable...drugged out of it's mind on Sponge Bob GBA games.
Hmm...actually considering selling Super Mario 64 DS and Mario Kart DS. I beat everything in both and doubt I'll go back to them. Ok games, but Castlevania and Meteos they are not.