A new pattern for Vivillon has been revealed by the official Japanese Pokémon site today. This pattern of Vivillon is known as the Fancy Pattern and will be distributed once the Pokémon Global Link for Pokémon X and Pokémon Y reaches 100,000,000 trades. Full details will be given on how to obtain the Vivillon once the total is met.
The reveal of the special Vivillon was to celebrate that over 84,000,000 Pokémon have been traded worldwide over the Pokémon Global Link for Pokémon X and Pokémon Y since the games were released last October.