I’m sure it’s a real iPhone or iPod dock for charging, but not like this. And the dock is really unique because of the shape of Nintendo controller.
In fact, the dock comes from an early Nintendo controller. The creator, GeekUnique thrusts charging device into the controller, and adds USB cable for the iPhone dock. Now you can charge or sync your iPhone or iPod via the Nintendo Controller iPod/iPhone Dock.
This handmade gadget is available for $34.99 USD. You can get the dock from Etsy.