If you reset your pokewalker your Pokemon will go and all your data will be deleted. That includes the steps places and watts.
DONT BOTHER DOING IT UNLESS YOUR HAVE STARTED A NEW SAVE AND THERE IS A POKEMON ON THE POKEWALKER WITH A POKEMON ON IT!!!
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you hold down, x, and L at the same time in the pokewalker screen
you hold down, x, and L at the same time in the pokewalker screen
Resetting the Pokewalker doesn't affect Routes; they are stored on your cart.
you click on the button on it
There may be a few reasons, but you will probably need to reset your PokeWalker. The instructions are in the instruction booklet that came with the game.