It has been revealed that the next special form of Vivillon has been announced. This form, the Fancy Pattern, is to be distributed when over 100 million Pokémon have been traded on the GTS and is to tie in with the fact that Vivillon is the most traded Pokémon.

The number is currently sitting at 85 million so only has 15 million to go. It is said that the distribution will be worldwide. The actual means of distribution has yet to be confirmed but we'll post as soon as it is...

http://www.serebii.net/index2.shtml

If it weren't for Gengar and Machamp that trade value would be cut by 45mil due to the trading back and forth. I hate loving them Gengars.

That number is actually more impressive than the xBillion bullets fired per hour in Call of Duty.