Mamatoto

Story
You (Nanas) are the prince of the moving castle nation Mamatoto. Your goal is to go out and conquer all the other nations and conquer the world.

The world is locked in stalemate, so none of the nations can take over the world because if they start a war with another country, a third party will take the opportunity to wipe them out. Mamatoto is different: it has zero territory to worry about. The problem is, it doesn't have much of a populace either. As Mamatoto doesn't really have an army, for many years it has been hiding in the monster lands.

You, Nanas, a studious young mage, have recently invented a spell to craft magical soldiers. These magical soldiers are made via cards which you can obtain from battles. The more battles you fight, the more cards you collect, and the more troops you have in reserve. So now, Mamatoto, the fastest moving fortress in the world, has begun its ploy to conquer the world. Mamatoto's goal isn't to get territory - it's to take out governments.

Two alternate universe versions of this game have been made: Mamanyonyo, and Mamanyonyo's remake, Widenyo.