With Wave 3 first hitting the east coast (US) roughly around January 12th, I had still personally NEVER seen a single pack of Double Trouble in person. I got lucky and found him available on GameStop.com...a few days later he is now ready to join the battle vs Kaos:
Before anyone says I'm crazy, I just demo'd my video and even through the camera it looks like Double Trouble's eyes follow you...it is really a pretty cool feature if it was intended...if not, I've probably spent way too much time playing around and looking for Skylanders.
Double Trouble is the last of the Magic Element Skylanders to be released and will complete the set giving you stat gains if you have the rest in place (Spyro, Voodood, and Wrecking Ball).
Double Trouble's slogan is Boom Shocka Locka (which is instant nostalgia with me as it reminds me of NBA JAM on the SNES, lol).
His stats (since I've been doing it since the beginning) are as follows:
I think Double Trouble is a nice character and I'll be interested to see how he upgrades. You can also find his Heroic Challenge here: