With the Galactic key you can unlock any locked doors in the headquarters.
I think it's just a shrine to the legendary Pokemon and that you cannot get into it in any way.
You have to have defeated Team Rocket in their Veilstone City HQ.
In Pokémon Diamond, you can obtain Deoxys by attending special events, as it is not available through normal gameplay. One such event was the Pokémon Ranger: Guardian Signs distribution, where players could receive a special item to unlock Deoxys. Alternatively, you can trade with players who have Deoxys from other games or events. If you're looking for a legitimate way, keeping an eye on official Pokémon events is your best bet.
Serebii.com has a list for every game
events are special places you go so you can get shaymin darkrai arceus etc. where do you GO to enter events in Pokemon diamond?
get thegost glinch
which island do you mean?
You can't anymore, but there were a few special events, so if you get wi-fi, you could always ask to trade for one.
The Battle Factory is unavailable in Diamond or Pearl, but it is in Platinum, Heartgold, and Soulsilver.
The Salac Berry is a rare berry in Pokemon Diamond. It can only be obtained from distribution events that had legendary Pokemon holding them. These events are no longer being ran or support for Pokemon Diamond.
You don't do live events in Pokemon diamond...that's why they're called LIVE! You have to go to one in real life
NO! You can only unlock pal park on platinum, diamond and pearl
You can't only in Pokemon Platinum unfourtunatly.
you cant
You have to go to it but nothing happends
the only way to get it is to trade it from Pokemon diamond or pearl you can get it on diamond and pearl by special events