I somehow beat her, so this is solved
Well I managed it to get until Terra without help but now I need some. I can't get past the Garchomp. It destroys everything with Draco Meteors and even after using 2-3 of them its damage output is unreal, I don't even know how that is possible . Basically I beat her team without many casualties. I have a full life Torterra, Barbaracle & Arcanine (except for Stealth Rock damage) and an almost dead Eelektross (which I can heal but it still gets 2hit :/) against the Garchomp and I can't manage to beat it.
I guess my last strategy that has a chance of working is reviving my Noivern to Tailwind and try to kill it by having my mons moving before it but the physical/special split is hurting me pretty good here.
Nvm: cant setup tailwind since chomp is faster
Edit 1:
Torterra, Adamant: Eearthquake, woodhammer, crunch, synthesis
Noivern, Modest: Hurricane, dragonpulse, flamethrower, tailwind
Eelektross, Quiet: Discharge, Flamethrower, grass knot, crunch
Arcanine, Rash: flamethrower, close combat, crunch, extreme speed
Scrafty, Careful: high jump kick, crunch, ice punch, head charge
Barbaracle, Jolly: Stone edge, that water shell signature move, cross chop, surf
all lvl 67-69
all have okay to good IVs and EVs are close to the max for most of them. no ideal spreads, mostly balanced around all stats, albeit trying to avoid useless EVs.
I got a couple TMs but nothing that'd help aagainst chomps except for Swagger. I will likely give that to Swagpants McScraftystein and see where life takes me.
Edit 2:
After using Draco Meteor twice already the garchomp brings my Careful 24/23 IV 84/100 EV on HP/Sp Def Scrafty with 1 X Special unto 10 HP using Draco Meteor with no crit. Fun times.
Also, because of the split my only Ice move does nothing to chomp, barbaracle also does nothing because water is special. Noivern dragonpulse only hits for neutral damage. Tried it so many times and even after getting very lucky (killing Nidoking with Noivern without taking damage while Terra used 1 Potion & killing Excadrill with no damage because she used swords dance, killing Quagsire with Eelektross, losing him in turn & killing Hippo & sandcastle with torterra which then died to chomps. even after chomp missed his stone edge on noivern dragonpulse did 15%. scrafty surviving with the said 10 hp doing 20% with ice punch. everything I do to it is chip damage. I'll probably stack up everybody with Gems and my 1 Focus Sash and see if that leads me somewhere but I don't see me winning this even with Blizzards & stone edges missing from the opponent maybe I'll get lucky with using Swagger. after that I'll likely just grind until everyones 74/75, pray to lord arceus (or ditto, whichever it is). rinse & repeat with gems & focus sash.
except if somebody has an idea that I overlooked of course. I do have a couple caught mons but I don't do that rotation stuff, only got the main team. if everything else fails I have a lvl ~53 jynx that i could train up to use blizzard on Jaws, but I'd rather put the energy and exp into my real team. (had to ditch her from my team for scrafty after learning that confusion will be her strongest psychic move </3)