thebigboss14 said:
I was looking in a european web page about pokemon and it saids that theres a yellow forest event that you could get a pikachu with a special movement and one of them is fly.
Look:
SOURCE
PS: The page is in Spanish from Spain.
How is this related to the topic? In the latest Pokemon Sunday, Masuda said most of the Pikachus in that event will know Fly.
Anyways, the PokeWalker is just a thing for your Pokemans to get experience while walking. It's your choice if you want to use it, but it's not mandatory. Unless they have a way for you to download a "secret area" to put in the device and when you put your Poke and take it back, you will have (insert Pokemon here) in your party suddenly.
They should sell it separately 5 months after release, me thinks...