This one is going in the "straight outta nowhere" file as Best Buy stores around the country have released these horror and sci-fi themed Madballs from Kidrobot. These foam balls are so much like the originals that they even got the creator of Madballs, James Groman, to design these (along with the fine folks at Bigshot Toyworks). There's six different ones to choose from if you're one of those people that has impulse control and can somehow resist buying all of them. If you are, I don't understand your life.
On a side note, I am all about Best Buy carrying more stuff like this. I've got one of their credit cards for whenever our appliances die, as our microwave did not so long ago. The one I wanted didn't get me to the no interest financing deal, so I had to add to my sale. I ended up buying iTunes gift cards, but I could have gotten something like this instead. Now if car dealers would carry other stuff that I could trade my 2002 Mustang towards, I'd be in business. Like a hot dog stand. Or one of those sky diving simulators. Or an in ground pool for my basement.