I had this idea of turing Omnitrix Aliens into Heartless/Nobodies/Unversed and possibly Dream Eaters. Here we have Grey Matter as a Heartless. His head was more unique than the others, so I had to find a way to use that.
Description: Don't worry. These awful aliens won't abduct you. They will, however, use plenty of Gravity-based attacks that are guaranteed to make you feel a little sick. It's not a conspiracy; these guys mean business. But if you use Thunder-based magic, you're sure to give these invaders a close encounter of the PAINFUL kind!