After getting the 3rd badge, go to the north gate of Castelia City that leads to Route 4 and you’ll find Bianca there, who will battle you for the 3rd time. For this battle, her Lillipup and starter Pokémon have evolved. She also adds Munna along with an elemental monkey. Munna will use Yawn to put opponents to sleep and Moonlight when in danger. Herdier will use Bite to make targets flinch and Take Down to cause decent damage but damage itself in the process. After the battle, go outside to Route 4.<br />...<br /><a href="https://www.youtube.com/watch?v=MZqFje6zkBI" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=MZqFje6zkBI</a>