If you mean the harbor door the event is the Darkrai event! It has been distributed previously but you can have it from a friend that has it!
Members pass event if you dont have it then you won't get in
you have to have 2 or more pokemons and it has to be open. Its open in the day time
you cant. it is a special event that has already passed in Pokemon diamond. the item you have to get is the darkrai pass and then the door opens you fall asleep in the bed then you go into a dream where you find darkrai he is lv 70 hope this helps
it says cut the door, so go to the door then use cut with a Pokemon that knows cut and the door will open.
Peema is a Pokemon only accessible through events and not regular gameplay. get the white pearl and go to day care center. use it on the jumpcon and it will cause an explosion. a new area will open. you enter the area and battle 20 Pokemon then you'll hear a rumble. another door will open. peema will be there for you to catch a level 1.
by eating cheese!!!!
you need an event called member's card to open that door which allows you to catch darkrai but sadly the event is over.
In Pokemon platnom the door opens magically when you catch the newest Pokemon CROWLEY caught at an event and when you go tho the door it should be open.
If you received it by mistery gift, the door should open normally. if you put it there with pokesav, you can't.
Maybe you're trying to open the wrong door with the key.
you need the mebemer card that you get at any pokemart from a men in green
You need a Member's Card, which is an event item. Inside the house, you go into a bed and go to sleep and fight Darkrai at New Moon Island.
i think that to open it you have to talk to the boy who is in bed in the house near the boat that takes you to iron island. cos in the hotel is darkrai sorta. also its an event so that might have something to do with it.
Members pass event if you dont have it then you won't get in
get to front door...try to open it...if its locked...go catch a ditto you need national dex to catch him on canalave city, then go again to the hotel and it will be open
You go to the locked house in canalave city and it should let you open the door....sometimes not
You have to have the Member Card from a Pokemon event (which takes place in different places in the real world) and then the door will open