101Leafy researched the games.
Lullaby Spear

Lance with concentrated Sleep Herb infused in its blade. Knocks foes out cold.
| Class | Lance |
|---|---|
| Rarity | 3 |
| Attack | 184 |
| Sleep | 160 |
| Slots | 2 |
| Price | 1,750z |
Upgrades
| Upgraded from | Spiked Spear |
|---|---|
| Upgrades into | Requiem Spear |
Can also be made new at the smithy.
Upgrade tree from モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 746.
Materials
Plesioth Fin ×4, Cephalos Fin ×4, Sleepyfish ×10, Springnight Carp ×5