Yes, it is right. The PokeWalker course, the Yellow Forest, will be re-released for the Japanese versions of HG/SS. It will be available for download, through Wi-fi, from 16th February to 28th February. For people who don't know what's special about the course, it holds six different types of Pikachu, with one type that knows Surf, and another type that knows Fly.
Steps
1. Obtain PokéDex
2. Download Yellow Forest Via Wi-Fi Connection
3. Visit Green Suit PokéMart man
4. Choose Course "Yellow Forest" on the PokéWalker Course Menu
Why did they release the same course twice for the Japanese versions?
They never did such a thing before.