Some 3DS games use the spotpass feature and automatically recieves downloads of free DLC to your games. I'll post the several updates for the games the I've gotten updates for or heard of. Recently today I got an update for Samurai Warriors Chronicles. I got brand new stages and missions along with a maximized level 10 weapon. Nintendogs + Cats recently got a free toy along with president Teddy Rosevent's dog Pete the Bull Terrieor. Nintendogs owners can visit Pete at the park, interact with him and you dog, and have a friend to visit anytime.