The very same Lunar Wing appeared in Sleepless in Pre-Battle!, where it was used to find the place where Cresselia resides. Team Rocket also sold what they claimed to be Lunar Wings, but turned out to be merely painted Pidgey feathers.
A Lunar Wing was briefly seen in a flashback in The Final Dimensional Duel V. To help Eldritch wake his son up from a terrible nightmare, Palmer had traveled to Fullmoon Island in search of a Lunar Wing, only to find out that all the Pokémon on the island were suffering from nightmares as well. Palmer had been unable to help the suffering Pokémon, but then Cresselia had appeared, using Lunar Dance to heal the Pokémon. Cresselia had also dropped down a Lunar Wing, which Palmer took back to Canalave City and cured Eldritch's son with it.