Lustrous Orb is an item in the “Species-specific” category (Items).
In-game descriptions
| Diamond / Pearl · Platinum · HeartGold / SoulSilver | A beautifully glowing orb to be held by PALKIA. It boosts the power of Dragon- and Water-type moves. |
|---|---|
| Black / White · Black 2 / White 2 | A beautifully glowing orb to be held by Palkia. It boosts the power of Dragon- and Water-type moves. |
| X / Y | A beautifully glowing orb to be held by Palkia. It boosts the power of Dragon- and Water-type moves when it is held. |
| Sun / Moon · Ultra Sun / Ultra Moon · Let’s Go, Pikachu! / Let’s Go, Eevee! · Sword / Shield | A beautifully glowing orb to be held by Palkia. It boosts the power of Dragon- and Water-type moves when it is held. |
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