You give it to the girl who is locked out of her cabin. She will give you lava cookies
Truly I dont think you can get it in Diamond or Pearl version sorry.
The Suite Key is northwest in front of the entrance to the beach of Route 213. You will need to use the Dowsing Machine Poketch App to find it.
you can't.
use the dousing app. around the lobby
use the dowsing machine near the suite
a lava cookie
no, it's only available on platinum.
You can obtain potions and other helpful items for you and your Pokemon. You'll also need to use the dowsing machine in Pokemon Diamond, Pearl, and Platinum to find this lady's Suite key because she lost from watching the scenery around her.
Use your dowsing machine around Lake valor and you should find it neartwo homes
where are special key in Pokemon diamond where are special key in Pokemon diamond
check serebii.net for info on upcoming events for Pokemon Diamond,Pearl,Platinum.
You can only get it at a nintendo event but that already passed So your only hope is an action replay.