Looks like its time for some team recostruction my friend.
Drop: Carbink, Fearow, Vileplume, Helioptile(If you want to)
Replace: Frogadeir, Mareep(For Helioptile), Deerling, Murkow/Houndour (You are gonna have to train them, use the breeder outside of Amethyst Cave)
Refer to the location guide to find these pokemon. My reasoning: Greninja should be able to take care of chandelure and its a dark type, Ampharos parafusions her whole team (Literally how I won), I heard Swasbuck does well vs her Mismagius/Dusclops with leech seed and horn leech plus its a normal type. Honchkrow/Houndoom can be good back ups and supporting dark types.
You have a jumpluff lol you spam leech seed, stun spore, and sleep powder and win.