Nintendo announced that Pokemon X and Y will be down today for eShop maintenance. Online play and rankings will be unavailable from Monday, March 10, 2014 at 5:00 PM PST through Tuesday, March 11, 2014 at 7:00 AM PST. Get those Pokemon settled in their bank for the night and find another game to play!
Thursday will see extended maintenance from 1PM PST to 5PM PST, as well. This will see the eShop on Wii U, Wii, Nintendo DS and Nintendo 3DS going down, so plan your shopping accordingly. This is on top of the regular maintenence that sees the Wii Shopping Channel taken offline every Monday from 12PM - 4PM PST.
To kil the time that Pokemon is offline-only I recommended Poke-addicts to instead check out the lasted Twitch Plays Pokemon game, which is currently eight days into a game of Pokemon Crystal. It may seem impossible that they'd beat the entire game but let's not forget that they've done it before. Don't forget that your inputs into the game's chat will help it along.
If you don't own Pokemon X or Y remember that you can get one of the versions for absolutely free this month. All you need to do is register your Nintendo 2DS or 3DS on Nintendo's site, along with one of a number of selected games. Then they'll send you a code to download the game for free, just like that. It's an insane deal for one of the best-reviewed games for the system, and what's considered the best game in the series.