I have not used it on a walk yet, i was going to but i never got round to it. All i have done with it is transfer a Zubat i caught onto it, to see how to use it. Right now it is sitting in my Heart Gold Box.
i have one, then my mom put it in the washer it still works but now the pokemon in the pokewalker appears as a black square.
im going to use my cousins soon since he doesn't play with it anymore but i don't think it will connect to my game due to different trainer ID's and the pokewalker has my cousins name registered in it so...
Oh, I got my HeartGold version last year, and the first thing I did was to put the Pokewalker in the vase on my window-shelf xD
I tried to understand it, Even had my Scyther there. But it did not turn out good xD
So i gave it up and put it away :3
I've only gotten around to using it because I've had spare time to go on walks in the neighborhood. It's nice to hang out with my brothers, going around and picking up cans while being our obnoxious selves. I sometimes forget the only reason we are on the walk is because of the Pokéwalker.
Still, the blogs upon returning is fun to read. Depending on the Pokémon, it's rather hilarious. (I've had Mewtwo on it for the past few times, so it's a bit weird to read that he wants to jump on my back.)