You can't get a Soothe Bell in Gold, but you can get the Soothe Bell by trading with Jasmine in Heart Gold.
just go to goldenrod
You find a soothe bell at the Pokemon mansion
You trade any Pokemon for Jasmine's Steelix, and it will be holding a Soothe Bell.
Nowhere. The soothe bell was introduced in ruby/sapphire
You can't get a Soothe Bell in Gold, but you can get the Soothe Bell by trading with Jasmine in Heart Gold.
just go to goldenrod
You find a soothe bell at the Pokemon mansion
You trade any Pokemon for Jasmine's Steelix, and it will be holding a Soothe Bell.
Nowhere. The soothe bell was introduced in ruby/sapphire
The soothe bell is found in the Pokemon Mansion on route 212. The soothe bell is given to the player by the maid on the second floor.
The are NO soothe bells you can BUY in Pokemon Diamond. but if you want you can even get a Soothe Bell for free in Pokemon Diamond, just walk to the Pokemon Mansion and walk into the rooms, one of the rooms contains a soothe bell. Hope this helps.
You give on of your Pokemon the soothe bell and it will get happy faster.(It helped me evolve my eevee and togepi.)
Soothe Bell
you can find the soothe bell in the Pokemon mansion talk to the maid in the second left room
it makes Pokemon friendlier
Soothe Bell is not in Pokémon Conquest. Most friendship evolutions are obtained through Link.