Do I need PKMN B&W?

According to Nintendo:
[quote author=Nintendo on June 3rd, 2011 at some time I don't remember]
The Pokédex 3D includes a detailed information about all of the new Pokémon from Pokémon Black Version and Pokémon White Version – without owning these games. Pokédex 3D is the most detailed and complete Pokédex available on a gaming console, and also lets users to project them in real life. See your favourite Pokémon from every side, with a variety of poses and cute animations, all in full 3D.
This is a yes.
Yes, it's for free, and you won't need to have Pokémon Black or White.
Ok, I will going to buy this but if I like this PKMN so I will get PKMN B&W
I don't think you've understood a word of what I just said.
It's a Free App, so it can't be brought.
You don't need any other game to download the Pokédex.