YOU CAN BATTLE ALONGSIDE SHAUNA AT THE BATTLE MAISON. CRYING AND SHAKING.
This is way more than I was expecting in terms of post-game with her. Getting to battle with her in multi-battles makes me extremely happy.
info on it here (you just need to choose not to sync up with an online friend, then it gives you Shauna, Trevor and Tierno as options for a multi-battle partner)
