Are Pokéwalkers locked to the original copy of HeartGold/SoulSilver that they came with?

Solution 1:

According to my research you can connect any Pokewalker to any copy of HeatGold or SoulSilver (HG/SS), assuming it is clean and not currently synced to a different save file of HG/SS.

If you do not have a clean Pokewalker (one that is not currently tied to another copy of HG/SS), you can reset it without the original save file on your copy of the game.

Go to the Pokewalker Connection Screen and hold [Down + X + L]. After that, you can connect the Pokewalker to the game to wipe the Pokewalker clean.

Note: it appears that 3DS devices and beyond have a hard time connecting to Pokewalkers. You will likely need to do this on a DS or DS Lite device.

Another note: I did not test this myself, I just did research.

Sources:

• Nintendo Support Page for Syncing a Copy of HG/SS With Pokewalker

• Nintendo Support Page for Resetting a Pokewalker

• A Tutorial Explaining How to Reset Without the Synced File

• Another Tutorial Explaining How to Reset Without the Synced File