By far Legend of Zelda: Four Swords Anniversary Edition. Hardly anyone has this game but I seem to be one of the few people that were lucky enough to get it in the narrow time frame in which it was available. 10/10 (plus, it was free while it was available!)
I'd have to say Dry Bones. Being that I've been playing Mario Kart DS for seven years now and I have a three star rating and three stars on all of the missions, I must say that he is and always will be my favourte Mario Kart DS character.
