The Wi-Fi event of Darkrai that was announced a couple weeks ago is now active. Players with English games will be able to download it until June 10th. It is the same Darkrai that was distributed in various European countries, including Greece, during December 2011 so if you have already received one from those events, you won’t be able to get a second one now.
What’s more, registrations for the 2012 Spring Friendly Tournament are over now and you can battle up until May 14th. The tournament uses the same rating system as the ones before so the more you battle (and win), the higher your rating will be. Good luck at your battles!