North America, Game Boy Tennis Is Your New Club Nintendo Reward
Posted by Damien McFerran
New balls, please
One of the earliest monochrome Game Boy titles, Tennis isn't quite as amazing as Super Tennis on the SNES, but it's still worth a look if you've got some coins burning a hole in your (virtual) pocket.
It's available for 150 coins until 9th September. Thanks for the tip, Knuckles!