Question

I want to catch it, but how do I come up in the tower?

Answer 1

What Swampert said was almost right. You do get it from the man in Pewter, but the item is a rainbow wing in SS. You get the Silver wing from the director after saving the radio station from Team Rocket. The reason for confusion is the 2 items locations are swapped in the SS and HG

Answer 2

You have to get a silver wing from a man in Pewter city in Kanto. The man is found by following the path up to the poke-mart and going right and then going up after 10 steps. The man is old and bald.

Comments

But do I have to beat all the people in the pokemon lauge to go there?

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Yes, and Ho-oh is at lvl 70. I would reccomend getting lvl 65+ before getting him. You can train at Mt. Silver when you beat all 16 gyms. or you could beat the Elite 4 over and over.

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Thank you so much :)