ha really you havent got them!?!?! i have them amazingly for wish cave use charizard bring at least a half a dozen reviver seeds some oran berries 1 or 2 frustration's(give your self NO gummies) maxe elixrs and some huge apples. but as always be prepared to be rescued.
I beat purity forest by using alakazam(cooldude's info) on the first few floors collect everything and battle everyone. as you go through you wont learn many strong fightng attacks but the stratedgy i developed was to fight who i know i could beat and use teleport to run from the monster houses/ bad matchups. but I also had to get rescued by cooldude about 5 or 6 times. quite frustrating. but it's well worth getting the 2 hardest legendaries in the game especially since celebi is my favorite pokemon ever my ussual team when i train them stronger will be a typhlosion and celebi together. but take that advice and you should be able to beat both these dungeons with getting rescued.
P.S. if you die before floor 50 its not worth getting rescued unless its like floor 46.
Really hope this helps cause everyone always helped and helps me.
credit= EspeonDude_(not husky boy <_<)
Pokemon diamond friend code is 2835 6576 4587. my name is Ryan with only the R capi