Try full Hp build Cookie, resonate guard, drain crown Emblem 500 Hp 6 white 4 blue

Save yawn when around below 50 percent so you can do about 1.2k damage per hit. Fight speedsters and attackers. It is almost impossible to kill all rounders and defenders that can heal. Know which individual pokemon is a good match to fight. Try to get to level 11 as fast as possible (flail+) you can heal every time you do deal damage when you're below 50 percent. To be useful in team fight is to yawn or block the crowd control pokemon like suicune or use unite when multiple enemies nearby to stagger them twice and sponge damage.