The Pokemon pedometer

Can Pokémon end childhood obesity?
Nintendo has revealed the Pokéwalker - a pedometer that interacts with the Nintendo DS via infrared, which will accompany the European release of Pokémon HeartGold Version and Pokémon SoulSilver Version in March. Players can transfer any of their Pokémon into the Pokéwalker and then train them by taking them for an actual walk.
For every step you take while wearing the PokeWalker the transferred Pokémon will gain experience and happiness, eventually leveling up when a certain amount of steps are reached. So walking around a lot will mean you can do better in the game therefore creating a direct link between playing and exercise.