big update
I bought 99 revives and 99 Hyper potions
I walked thru the door to the finale challenge. In front of me I saw statue that said what and witch each elite trainer that lies behind each door.
I found out that too my right there was a door that harbored ghost Trainer Lucky me I had 2 Pokemon with dark attacks I switched in Liepard Lv59 and killed like 4 of her pokemon then I got careless and lost him so I thought I could push Embore Lv59 to deal a bit of damage so my weaker Stoutland Lv46 can take it down with a dark move and I pulled off a win and he got a level there now got to figure out which one next to go too. looks like another rinse and repeat scenario
Used 2 revives and 2 hypers
I deiced to do fighting next I don't have any tump card to do more damage but I have a fighting type on my side and the best part is I fire witch is better then using fire.
Embore is released then the elite throws Throh. off the gate I use Heat Crash and it takes him down bit above 25% if I have to guess 35% Did it once more one hit more too kill Throh. Had to use another hyper and he used full heal

did heat crash 3 more times for the kill. Next up Sawk lv48 this time I'll go with smog to conserve Heat crash only have 4/10 left. smog missed. So I tried it once more, a hit and poisoned. now I need to use hyper potion. I'm taking a risk and using head smash miss let's do this once more hit and he's out for the count. my hp is 70 so I need a hyper. Also bad news he threw out conkeldurr I know I'm going to be fighting a up hill Battle with the pokemon. Carp his Attack took half my HP lets hope he has no buff. Also I heal if you didn't know. he just did the same move I might be able to hold out till he's out of PP on his
Hammer Arm so I'll tell you when I stop rinsing and repeating. Breaking news he finally missed Time to drop him I use heat crash and he just critical hit me. So I use a hyper. Hyper are at 82. he hit me and I used heat crash. now I need to heal once more.
he just used grass knot so I hit him once more with Heat crash. and he just crit me so I need to heal and he used full restore on conkeldurr. I trying smog missed, missed need to heal did Smog, missed,missed, heal, smog hit no poison smog missed, heal smog missed and then hit. all he has is grass knot I heal so I don't kill my self for head smash hit head smash once more and ding dong the witch is dead. Now for his last he throws out Mieshao lv50 I heal and it looks like another rinse and repeat scenario
Other thought when doing this healing and get hit thing:Ether I wished I did buy more heals and maybe grained and bit more.
Took a big risk and paid off I his him with Smog with poison now just need to wait it out got lucky because I had less then 35% Hp and kill him with heat crash.
A win is a win no matter by the biggest margins too the smallest.