How do I get a rainbow feather?

You have to catch all 3 legendary dogs, (suicune, enti and raiku) then return to the tower you catch ho-oh and talk to the old man at the back of the room, and he will open the stairs for you.

You get the rainbow feather if you catch all the legendary dogs then you talk to the old man in pewter city

I got it from the dude in Peutar (i don't know how to spell it the one brock is in) near or in one of the houses he was an old dude I think?

Capture all 3 legendary dogs, then talk to the monk within the tin Tower, who should let you pass with the Rainbow Wing.

You get the SILVER Wing from the guy in Pewter city.

One of the monks in the Tin Tower gives you the Rainbow Wing after you catch all of the Legendary Cats.

~~yes, Suicune, Raiku and Entei are cats.

It says so in the Official Pok�mon Crystal guide book.

Hey guys I know how to get both the wings. So if you need the silver wing, go to pewter city. There is a old dude there in the east side ask him and he will give you the silver wing.And for the rainbow wing you will have to get all three legendary. Dogs and if you haven't caught that suicune in the bell tower thens it's of no use. So catch all of them then go to the entrance of the bell tower and one of the sage will give you it ha. SO EASY!!