[Advice for Charlotte?]

Apologies if I'm not doing this right, this is my first forum post

 

I'm up to charlotte as of now and I'm really stumped on what to do, nothing works, her tyhplosion instantly kills everything but Avalugg due to sturdy, and seadra due to water typing, Nothing I have can outspeed her And I'm continously being sweeped, I didn't plan ahead so there's no going back to reborn now And I'm stuck until I get past this

My team right now us

Seadra lv.70
no held item
sniper
careful
-surf
- dragon pulse
- dragon dance
- Hydro pump

Avalugg lv.70
Lax incense
Sturdy
docile
- Avalanche
- blizzard
- recover
- skull bash

 

Decidueye lv.70
Spooky plate
Long reach
Lonely
- Synthesis
- Leaf blade
- spirit shackle
- Nature power

 

Hawlucha Lv.70
pure incense
Unburden
Brave
- feather dance
- flying press
- swords dance
- Sky drop

 

Houndoom Lv.70

No item

flash fire

hasty

-thunder fang

-foul play

-inferno

-nasty plot

 

Toxicroak
Black belt
poison touch
Hardy
- sludge bomb
- mud bomb
- sucker punch
- drain punch

None of them are EV trained because I didn't think I would need to up until now, And I didn't know how to

A lot of people are saying to just get a lycanrock but would there be an easier alternative than having to level that all the way up?

Thanks in advance