Instructions
Turn on the Nintendo DS.
Select "Connect to Pokewalker." Choose "Go for a stroll." Select a Pokemon to transfer to the Pokewalker.
Press either the left or right buttons on the Pokewalker. Press the center button to select the "Connect" option to transfer the Pokemon.
Select the Quiet Cave Route. You must take 500 or more steps with the Pokewalker to find Feebas.
Transfer Feebas from the Pokewalker to the Nintendo DS. Select "Connect to Pokewalker" on the DS. Select either "Return from a stroll" or "Receive a gift," depending on whether you want the Pokemon you transferred to return to the DS. Move toward "Connect" on the Pokewalker and hold the center button to either transfer the Pokemon and Feebas to the DS or just Feebas.