Blue Flute is an item in the “Flutes” category (Battle Items). It costs ₽20.
In-game descriptions
| Ruby / Sapphire · Emerald | A glass flute that awakens sleeping POKéMON. |
|---|---|
| FireRed / LeafGreen | A blue glass flute that awakens a sleeping POKéMON. |
| Diamond / Pearl · Platinum · HeartGold / SoulSilver | A blue flute made from blown glass. Its melody awakens a single Pokémon from sleep. |
| Black / White · Black 2 / White 2 | A toy flute made from blue glass. A maniac will buy it for a high price. |
| X / Y | A lovely toy flute to admire. It’s made from blue glass. |
| Sun / Moon · Ultra Sun / Ultra Moon | A flute made from blue glass that awakens sleeping Pokémon. |
| Let’s Go, Pikachu! / Let’s Go, Eevee! · Sword / Shield | A flute made from blue glass. It awakens sleeping Pokémon. |
Where to find it
Not placed on the atlas maps (so far: Red/Blue and Generation 3).
Sources : PokeAPI (items, item_flavor_text, machines) · atlas · pokeemerald species_info.h