Pokémon Dash has an added feature that few games have had and seem to ever have. You can use it in conjunction with Pokémon Emerald to get some interesting results
Firstly, it is said that if you play Pokémon Dash while Pokémon Emerald is plugged into the GBA slot on the DS, then it will unlock some new tracks for you to race in.
When further details and pictures of these functions are known, they will be added to this page