I moved on to complete the Water, Fire, and Grass trials.
For the Water trial, I sent out Yun Yang to throw out a combination of Sand Attacks and Leers on Wishiwashi. Once Yun Yang fainted, Get Pecked was able to win by Plucking it twice.
For the Fire trial, I was going to Bulldoze the Salazzle and Salandit with Valley Girl, but she died with a single Flame Burst. I was able to beat them using Half Health's Rock Throw.
In the Grass trial, Lurantis' Solar Blade was doing strong damage against all of my Pokemon. I just had to outlast the Sunny Day and get off a Leer for Get Pecked to come in and win with Pluck.
Get Pecked and Valley Girl evolved within the same two battles.
Yun Yang (Level 27)
Get Pecked (Level 28)
Crabrawler (Level 26)
Ori isWithMe (Level 26)
Valley Girl (Level 26)
Half Health (Level 24)