The current answer didn't help,right?
First,the Professer gives you a master ball,which will catch Pokemon without fail.
Second,you also have to have a rainbow wing and a the bell.
Thirdly,you have to get to the top of the tower,when HO-OH come down to battle you,you can just use the master ball.
There you will have HO-OH.
(HO-OH is not really powerful though,Suicune,Entei,or
Raikou is ok.But Suicine is powerful of all.)
You have to purify every shadow Pokemon
No, because it is a legendary Pokemon.
first you have to use cut on all the grass in the game then hoho will come and attake you.
no but there is ho-oh at bell tower in hg and ss
Pokemon diamond Pokemon diamond Pokemon diamond
You can't find a ho oh in diamond or pearl you can only migrate it over.
on top of the tower but must have a lugia and hoho or thee thre dog pokemon.
nowhere.. its impossible youd have to trade from leafgreen or firered or soulsilver and heart gold
You can catch Hoho at night.
You can get Lugia from playing Pokemon XD and Ho-Oh from playing Pokemon Collesium. Then you can trade them from there to Sapphire and then move them to the Pal Park in Diamond.
You can't without trading, migrating or, cheats
You have to purify every shadow Pokemon
No, because it is a legendary Pokemon.
navel rock
you get an exacute in the hoho and the kanto reigon
you don't.....you trade them......
you go to tin tower