Instructions
Defeat the Elite Four to complete the game. After the credits roll, you are returned home.
Travel to Snowpoint City and go to the harbor. Get on the boat to go to Battle Zone. Walk into the Fight Area and enter Battle Tower.
Speak to the woman standing behind the middle counter to sign up for a Standard battle. Choose "Single Battle" when asked what type of battle you want. Pick the Pokemon you want to battle with.
Defeat 20 opponents. When you start the 21st battle, you face the Tower Tycoon. In this encounter, the Tower Tycoon commands a Milotic, a Rhyperior and a Dragonite.
Reach the 49th battle to face the Tower Tycoon again. In the second and final encounter, you must battle against a Regigas, a Cresselia and a Heatran.