Cubic figures. These are sort of like those Lego-men things, but with a Sonic theme. There's even Shadow the hedgehog on this set. It was released at the time of Sonic X. The loop at the top suggests UFO catcher, but it isn't known where they were available. Once, there was an import store link near the top left of this page that may still have these in stock.
The figures look well articulated despite being so tiny, with elbow, shoulder, neck, hip and leg joints on each one. Shadow's patch of white is rather large, ONLY in the above factory photo. Notice that they fixed it on the carded figures! This is a very interesting and small set of figures. These are Tinibiz Joy figures.

Here's what they'd look like MIB as well as loose. The figure is on a relativly small card with the Sonic X logo large at the top. The 'character pile' from the poster at left appears on the right side of the card behind the figure. It's a neat presentation for a cute idea figure...its too bad these are so uncommon.