This Article Contains information directly from the Pikmin Games. This article is based off of an Enemy/Treasure/Area/Cave/Pikmin/Character from the Pikmin series of Games.
The Master's Instrument is a treasure in Pikmin 2, it is actually a Mario Paints pastel stick labeled "Peach Pink". (This, referencing the Super Nintendo game: Mario Paint). It is found on the first sublevel of the Glutton's Kitchen. It is located inside a box with a Dwarf Bulbear in it, so be careful when aiming for it. There are also many more of them that can get in your way while transporting the treasure, so make sure they are removed as well.