The Yellow Flute (Japanese: きいろビードロ Yellow Vidro) is a type of medicine introduced in Generation III. It is one of the flutes.
In the Generation V games, the Yellow Flute can be sold to the billionaire maniac in Undella Town for 7500.
When used in battle, snaps a Pokémon out of confusion.
The Yellow Flute serves no practical purpose other than to be sold.