After you get the Master Ball, go to the Dance Theater. You will find all five Kimono Girls waiting for you. They will challenge you to a battle against them. Win and you receive the Clear Bell or Tidal Bell.
You cannot find the Clear Bell in Pokémon SoulSilver. All that's needed to summon Ho-Oh at the Bell Tower in SoulSilver is the Rainbow Wing which a guy in Pewter City will give you.
once you beaten brock you can find a old dude and he gives you the rainbow wing you wont need the clear bell
In heartgold and soulsilver you can get the CLEAR Bell after beating the komoto girls.
A man in Pewter City will give you a Rainbow Wing. Take that and the Clear Bell to the Tin Tower, where you will be able to fight Ho-Oh.
In Ecruteak city. Trust me, YOU WONT MISS IT
in whirlpool islands when u get tidal bell
u need 2 give it a sooth bell
You find it in the national park or when trading with Janine (any Pokemon for her Steelix).
there is no such thing, but there is a clear bell
You can catch chatot at the burned sprout and bell towers.
you will get the tidal bell that will awake lugia
in the northern part of violet city across the bridges