Tips on how to beat Hiker Bernard's Onix?

Question

So, this is a Wedlocke and this is my team.

Ranger (Braixen)
Scratch
Psybeam
Ember
Flame Charge

Pilliot (Pidgeotto)
Tackle
Gust
Quick Attack
Whirlwind

Gardener (Ivysaur)
Poison Powder
Vine Whip
Sleep Powder
Leech Seed

Babysitter (Drifloon)
Payback
Astonish
Gust
Focus Energy

Watcher (Furret)
Fury Swipes
Quick Attack
Foresight
Shadow Claw

Wrestler (Venipede)
Protect
Rollout
Poison Sting
Pursuit

You know the Onix that Hiker Bernard owns in the Cyllage City gym? He's so hard to take down - please give me tips!

Answer 1

Use Sleep Powder first, then Leech Seed, then just spam Vine Whip on Ivysaur.

And plus, if he is that very hard to beat, then won't your Pokemon be dead already?

Comments

I'm using all of my Mercy Kills to revive my team!