A forest in Sinnoh. It leads to Eterna City. It has the rock where Eevee evolves into Leafeon. Deep with in it is a mansion called the Old Chateau. It is where Rotom is caught.
Pokemon
Silcoon (Diamond only)
Cascoon (Pearl only)
Beautifly (Diamond only)
Dustox (Pearl only)
Murkrow (Diamond only)
Misdreavus (Pearl only)
Rotom (Pearl, Diamond, Platinum), one only, in the Old Chateau, at night
Gastly can also be found, but is very unlikey (Platinum Only) in Old Chateau (Diamond,Pearl and Platinum)
Aipom (Platinum Only)
Hoothoot (Platinum Only)