This figure was unique, because it could move on it's own. He is a wind-up toy. If you wind his tails, they'll spin slowly. He came with a PVC Chao. (Shown next to a ReSaurus)

It's very interesting that this figure was their only self-moving "action" figure. Why did they only incorporate wind-up into 1 thing? Is the mechanism the reason his body is so big?

Tails:
This guy could've been a contender. But his body is huge, making him resemble Tails' chubby cousin 'snails' or something. Also, his expression is goofy rather than looking like a design error, as Sonic's was. He is also quite large, breaking up the scale to other figures.