Nintendo Dual Screen (DS) loose cartridges of both Advance Wars: Dual Strike, and Advance Wars: Days of Ruin.
Both tested, and work great :)

See the last two pictures for the games starting up and working!

These DS strategy games both play out in a turn-based fashion on a square grid, utilizing different COs (Commanding Officers) and their skills. Units aim to destroy the other force of units or capture their HQ. There can even be a total of 3 opposing officers.

(Shipping now goes to both Canada and anywhere eBay International Shipping supports!)

Let me know if you have any questions at all!