HALP! I my hero is a Vulpix Lvl 74 with the moves Flamethrower 1, Extrasensory..

Im suprised that you havent beatend darkrai at that lv, well darkrai is a ghost type so I sugjest you're shinx use crunsh at him, well the ryphirior is another story, he is rock/ground type I think so neither fire or electric tyoe moves will be effective against him, so maybe you're vulpix should use extrasensory on it if thats the only problem you got about the darkrai boss I think this will help hopefully

Darkrai is a DARK type, not a ghost type. Vuplix's Extrasensory won't affect him. It's easier if you give him a status condition-accidentially paralyzing him or throwing a sleep seed ay him will help a lot.

As for Rhyperior, a Confuse Ray can put him out of action while you take care of everyone else. Shinx won't be very effective with his electric type moves-Crunch would work better. To really do some damage, spam Extrasensory.

Are you serious about the rhyperior? Dude, I still have not lost to any ground type Pokemon and I am a shinx lvl 45! All you do is eat a violent seed, and crunch both of them at least twice each. Once rhyperior is gone, just discharge and it will probably kill most of the Pokemon leaving darkrai to face all three of you, shinx, vulpix, and cresselia.

Take out rhyperior then use discharge (make sure you took out misgaius to cus it's know as a cresselia killer) then discharge away make sure you keep on using sleep seeds on darkrai cus there is also a small chanse that he gets affected by his own ability bad dreams (this dosnt happen many times but 1/10 of the time