Claim yours before the end of the month
100 million trades have been made through the Global Trade Station in Pokémon X and Y and, as promised, Game Freak is handing out Fancy Pattern Vivillons for the milestone. Nice job, all!
The distribution event has commenced -- with your online-enabled 3DS, choose "Mystery Gift" from the main menu of either game to receive the new 'mon.
This specific Vivillon can't be obtained any other way, so get to downloading. It knows the move "Hold Hands." Battle effect? "Ally Pokémon hold hands. This makes them very happy." Well then.
A Vivillon of a Different Pattern! [Pokémon]