When you go to Driftveil City, meet Charles there and he will introduce you to a Triple Battle, where 3 Pokémon can inhabit the field during battle. Sigilyph will use Light Screen to weaken special attack damage for 5 turns and Air Cutter for critical hits. Archen will use Quick Guard to protect its team from first strike moves along with Pluck to steal berries from foes. Tirtouga will use Aqua Jet to strike first and Wide Guard to protect its team from moves that strike multiple opponents. After the battle, explore the city a little.<br />...<br /><a href="https://www.youtube.com/watch?v=sv6JwbBwIO4" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=sv6JwbBwIO4</a>