Another one of those famicom-in-a-controller things that are so common nowadays. Looks like a 3rd party N64 batarang controller, with a power button where the analog stick would be. No doubt has the usual built in games. These units tend to actually have different games in them, so if the box says "50 games included" all the games will be different and not just 50 variations of the same game. I've got a few items like this and they're actually kind of fun, some of them even have original games and not hacks.
Released in northern Europe.