I'm still Missing Icy Snow, Sandstorm, Jungle, and Sun Patterns. People over GTS need to stop giving me Elegant's when I put my Polar's up for trade. I clearly ask for the Sun Forms. If you can't read English, DON'T TRADE WITH ME OVER GTS! It's so frustrating.
If you want to use the GTS for Vivillon trading, you want to be lightning quick when someone puts up the form you want as patterns other than Elegant/Modern/Polar/High Plains will be gone in matter of a second. If you put up your Vivillon asking for specific pattern then of course you're not going to get it. There are hundreds, perhaps even thousands of people waiting to mash buttons and snatch the pattern they want.
The only pattern I have left is Sandstorm, though I'm taking it easy with waiting for the opportunity.