Nintendo is serving you up an extra 250 stars for your Club Nintendo account... but only if you get in on the action soon!

Nintendo of Europe is adding a special little incentive to pick up Mario Tennis Open when it hits stores this week. If you're quick to buy a copy of the game, you'll be able to redeem an extra 250 stars when you register it on Club Nintendo.

All you need to do is register the game on Club Nintendo before May 28th, and you'll earn an additional 250 stars to the ones you'd normally get.

Mario Tennis Open is out in Europe this Friday. Be sure to read our review to see if it's worth making a swing for.