A word of caution: If you have kids, don't get this. And if you do, be prepared to it within the first 24 hours of purchase.
As much as we love this robot USB key, we feel obligated to issue that warning from personal experience. But if you're not a parent, guardian or schoolteacher, then by all means have a look at this neat little device from Japan's SolidAlliance. Sure, 256MB isn't much storage space by today's standards, but how many other USB keys can you dispatch to do battle with Ultraman?