There is some kind of weird dance controller for the Wii.

What's this for? What games are compatible with it?
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Sign up to join this community"Family Trainer" is a Japanese game by Namco, and could be considered a competitor to the Wii Fit. Here's a video of the game in action:
In the US, the game was retitled "Active Life: Outdoor Challenge"
The controller also works with the game's two sequels, Active Life: Extreme Challenge and Active Life: Explorer.
It also seems like this controller uses the GameCube ports on the top of the Wii to connect, which would make it incompatible with the Wii Family Edition, which lacks them.