The same way you had to complete all your required tasks in Wizard City before you were given the key to Krokotopia, so must you complete all your required assignments in Krokotopia before you will be offered the key to Marleybone.
and if other people are reading this and didnt understand Mrs.Greyrose what she meant was you must complete all available tasks in krokotopia in order to go to marleybone
ps: if krokotopias a bit hard :( or your not a member and wanna skip krokotopia find a friend who has unlocked marleybone and follow her/he to go there and mark yo location
I have went back and checked 3 times, i have all the tasks on krok done. But i still don't have marly unlocked. Someone help me please. :(
I only have quests on finding the books and beetles left, and still dont have acess to mareleybone despite getting quests that rquires you to go there, so if you have something like this as well or have completed all I would like to know whats wrong too. Also when it comes to the tomb of storms in krokotpia it only let me in once, after that I couldnt do it again, any suggestions what might be going on? Ive completed almost all tasks in wizard city, grizzzlehelm, wysteria and krokotopia, only ones left is to fing books and small things,
well every one wants to know so anwser when do u get marly bone/ 
what she meant was you must complete all available tasks in krokotopia in order to go to marleybone 