It was riding a rocket, had green skin, and kind of looked life an elf.

In fact, it looked very suspiciously like a "Happy Little Elf" from The Simpsons, which I imagine (with this new found knowledge) is kind of a combination between a Smurf and and Astrosnik.

As an aside, the Happy Little Elves on The Simpsons really make me laugh.

From what I saw, it seemed to be all eight of the regular Sniks figures that were produced by McDonald's.

Also, I have read on this board that they do resemble the Smurfs in a way -- but as many may have discovered, they were not created by Peyo, the original creator. They have that appearance though, because like the Smurfs, they originated in Belgium, where this character style was originated; however, unlike the Smurfs, they were created by a different entity, just as the Snorks (another host of characters that had their roots in Belgium) were...but that's another story! ;-)

As for colors, the standard Sniks are green, but I have seen blue and black ones as well.