Gengar get infront of that Hypnosis with a Mirror Coat. If Ninetales keeps using Hypnosis then thats your job for the round. If not or you manage to put it to sleep Thunderpunch Charizard and end with a Rain Dance.

Nidoking while Gengar covers you try to do the same for him and trigger some Subs. Start with a Rock Slide to trigger Charizards protect. Follow that with a Aqua Tail to Charizard if Ninetales is asleep, if not use Earth Power at Ninetales to once more trigger its sub and once the rain is in effect another Thunder at Charizard. If you happen to get caught by Hypnosis then just use Sleep Talk.

Gengar - Mirror Coat ~ Mirror Coat/ThunderPunch ~ Rain Dance
Nidoking - Rockslide/Sleep Talk ~ Aqua Tail/Earth Power/Sleep Talk ~ Thunder/Sleep Talk