Team Help Oras

[G-Rat]

Hey i know this game is old and i have sun i just have been playing more oras lately i need some help from the pros out there im new to this competitive thing and a buddy of mine has a team of ubers and a couple non i can get pretty close to beating him sometimes but i dont wanna use any legendaries as a pride thing 

His team-
zygarde
-coil
-dragon dance
-extreme speed 
-earthquake

yveltal
- oblivian wing
-suckerpunch
-foul play
-dark pulse

Darkrai
-dark void
-Nightmare
-dreameater
-?????

Origin Garitina
-shadow force
-????
-????
-????

Jirachi
-iron head
-doom disire
-cosmic power
-healing wish

Mew
-rock polish
-iron defence
-block
-batonpass

My team

Mega kanga
-fakeout
-sucker punch
- return
-powerup punch

Klefki
-toxic
-swagger
-thunderwave
-foulplay

Togekiss
-Thunderwave
-swagger
-air slash
-roost

Talonflam
-brave bird
-acrobatics
-flare blitz
-u-turn

Weavile
-ice punch
-knockoff
-low kick
-poison jab

Gliscor
-sword dance
-facade
-earthquake
-roost

Please help i cant beat his team no matter what i try to do if anyone has any suggestions please help