Now you have your army, you can go through the game. There are various levels with different opponents in. When you enter the level, your army of Pokémon will attack. If your Pokémon are strong enough, they will push back the opponent and eventually win the level.
This is determined by two factors. First is numbers. If you have a sufficiently large army, then you'll be able to get through the stages and defeat the Pokémon. The second factor is type. Like all Pokémon games, type is a significant factor, so if you send waves of Chespin against a Pokémon like Delphox, you'll require far more Chespin to get through. Alternatively, if you use Froakie, it'll take far less.
You can see your progress on the bottom of the top screen. Your progress is the orange part that comes from the left and the opponent is the red that comes from the right. When either colour fills the entire bar, the battle is complete.
At the end of each stage, you will see the amount of Pokémon that you lost in the battle.
We'll provide full details at launch