A Battle Royale Background, 5 Diamonds, and that's it really. There might've been one more minor thing that I missed out. Credits also rolled after beating the challenge.
Can you post a pic of what the background looks like?
What's your secret? So far I've only captured Polar, Tundra, Elegant, High Plains, and River while seeing Icy Snow. I've only come across those five I've captured for a while now...
Managed to nab a 2,152 Epic Dialga last night which was cool. It's too bad its random traits are Techie+ and Mighty.