Gaming What is this Nintendo Wii accessory?

[Charli]

I want to sell it on ebay but have no idea what it is.. ^^' Maybe it's not even for the Wii?

Here are two pictures:

https://scheel.owncube.com/index.php/s/3T2B54y3wwZ5B24
https://scheel.owncube.com/index.php/s/6FWcxNwgH57XHNB

 

[KiiWii]

Not for Wii... it’s for fitness coach on DS.

 

[Charli]

Doh! Thank you I should have realized it fit's in the GBA Slot of the DS.

Here's a Video of someone showing a game of the "My Coach" series (?) off. At the end sth very similar to what I have is shown.