Wo... Wait a mintue. that's not how u unlock murky cave. U have to wait til gengar comes to the base. then he askes u to take him to Mt freeze. then go where u first met ninetails. he'll ask ninetails to break the curse. but ninetails can't, then he askes u to take him to murky cave so the pokemon can braek the cruse so garavior can return. the next day after garavior returns, garavior will ask u if she can join u. i went that far in the game. good luck!