Just boot up you 3ds and download pokedex pro.
Do you know what a QR code is? when was the last time you saw one?
The idea was to go around scanning codes to collect Pokemon into you dex. By doing this you got a augmented reality image of that Pokemon.
Here’s the problem, you already have all the Pokemon registered (it’s a pokedex) meaning there is no reason to look, along side the game showing you all the Pokemon QR code next to there entries (its taunting me).
Guess the other game you could play is dream radar, but that only works with black/white.