You need to go to the dance theater in Eukrate City and the kamiko girls will challenge you defeat them and they will give you the clear bell and tell you to meet them at the tower. However you must already have the rainbow wing and the ecrate gym badge to catch ho oh and first you should go to you home town and talk to professor elm. He will give you a master ball which is very importand and makes it much eqsier to catch ho oh. Now you are ready to go to the tower in north eucrate not the burned one the one next to it and catch ho oh. Good luck.