Where do you get the silver bell in soul silver?

Answer 1

Are you referring to the Tidal Bell?

If you are, you have to get all the badges in the Johto region, then Professor Elm will call you and tell you to come (He is going to give you a Master Ball). After that he will tell you the Kimono girls called for you. Then you go to the city with the burned tower and the entrance to Ho-oh's tower (sorry I don't know what it's called from my mind) go to the Theater. There you will have to battle all five of them, they all have evolved forms of Eevee (Umbeon, Espeon, Jolteon, Flareon, and Vaporeon) after you beat them, they give you the Tidal bell, but then a little girl comes and says she saw a BIG shadow in the water. The Kimono girls then go to Whirl Islands (Go to the top left, trust me it took FOREVER to find where. Make your way down to the center and battle Lugia.

Or the Clear bell?

After you beat the Elite four and go to the Kanto Region make your way All the way to Pewter where you'll find an old man on a hill. Talk to him and he'll give you the Clear bell. If you want, go to bell tower, get to the top and battle him.

I never knew there was a clear bell thanks!