The Silver Wing appeared in several episodes in the Whirl Islands. In The Mystery is History, Luka rescued Silver from Cassidy and Butch, and explained that she was trying to discover information about a Silver Wing that she got from her great-grandfather, which she now keeps inside a locket. When Silver's parent appeared from the ocean, her Silver Wing began to glow a violent red. When it finally began to trust them and calmed down, the glowing stopped. When everyone went swimming with Silver and its parent, she realized the Silver Wing is a feather from Lugia, and became relieved to have finally unlocked its secret.
On Silver Rock Isle, there is a tale that a crew caught in a storm was rescued by a wild Lugia. From that day forward, the citizens on the island have glorified the Silver Wing, putting it on various trinkets, jewelry, souvenirs, etc.
The Rainbow Wing and Silver Wing were revealed to be on Yellow's hat. These artifacts were used to free Gold from the gap of time inside the Ilex Forest shrine where the Masked Man had trapped him in.
The Masked Man also used a Rainbow Wing and a Silver Wing directly collected from their respective Legendary Pokémon in order to create a GS Ball. Only a capture net created from these two feathers could contain Celebi and allow its holder to travel through time without suffering its negative side effects.