RE: The HG/SS Question and Answers thread
Yeah, it's the same way –– it's Up/B/Select, and when pressed on the title screen it comes up with the characteristic blue screen (the same one that comes up when your save file is corrupted). The only difference is that the game reminds you that all Pokéwalker data is deleted as well once you get rid of the game card data (on the second confirmation), so ShipperGirl855, you might want to check your Pokéwalker too if you think there's anything of particular interest on it. If you decline to restart the save file at any given point on the "blue screen," the game just resets normally like a soft-reset (or if you've ever received a Wonder Card, the same way it resets after you receive the gift), so there's no risk of anything getting deleted.