well. Its....meh. It got boring for me after a while. You use the stylus, or rubbing strap to repeditaly(sp) move it make pikachu move in whatever direction you are rubbing it. It may scratch your touch screen a little. I personally wouldn'd buy it. If I were you, I would get Metroid Prime Hunters on the 20th instead.
I got Pokemon Dash as a Christmas Present from a family friend (it was another game, but I didn't want Star Wars so I asked if I could get PD). I still havn't recieved it yet though, lmao.
Hopefully when I get it in April, I'll see what it's like, but possibly I'll be too busy with Trozei to play it. (Yay, One more week to go for Australia!)
I bought the game because I am a pokemon fan like all of us but I'd say do not buy it. Why? because it ruins your touch screen, and all you do is race with pokemon, its just like any other racing game except using the stylus.