It is for the event for... (Darkrai?) Anyway, You need to use a cheat device, since the event is over. Basically, you go in, sleep, exit, then you never go back in... NEVER... (lol) I'm not sure... It's been a while, but I think the battle happens in your dream.
well you need the code and press L+R while walking into a pokemart here's where you can find the code
: codejunkies.com
go to England
and find the code for darkrai
you have to go to an event to get it, its to get darkrai
You can't find the key in Pokémon Diamond, you can only get the key for the Harbor Inn in Canalave City from Nintendo events.
practice on spelling for darkai diamond
you have to cheat
In Pokemon Diamond, Pearl and Platinum Darkrai can be found on Newmoon Island. To get to Newmoon Island you need the Member Card for the Harbor Inn at Canalave City.
i duno but try sometime when it gets dark, because you meet darkrai inside in a dream so it must have to be dark because darkrai is a dark type pokemon.
You have to have either an action replay or an event.
The Harbor Inn in Pokemon Diamond is only accessible by using the Member Card. This item is only obtainable through an official Nintendo event.
practice on spelling for darkai diamond
At the harbor inn at canalave city. You need a member pass which you can only get through a Nintendo event
you look for it
In harbor inn
Action replay
you have to cheat
You could have only gotten a Mystery Gift through Nintendo in order to access the Harbor Inn in Canalave City in Pokémon Diamond however the key that's needed in order to gain access to the Harbor Inn, the Member's Card, it was never released for Pokémon Diamond so the only way for you to get the Member's Card is to use a cheating device such as an Action Replay or Pokésav.
In Canalave City above the Pokemon center
In Pokemon Diamond, Pearl and Platinum Darkrai can be found on Newmoon Island. To get to Newmoon Island you need the Member Card for the Harbor Inn at Canalave City.
you need a mystery gift
You must get the Member's Card via Nintendo Event to get into the Inn in Canalave City.