Soul Dew is an item in the “Species-specific” category (Items).
In-game descriptions
| Ruby / Sapphire | Hold item: Raises SP. ATK & SP. DEF of LATIOS & LATIAS. |
|---|---|
| Emerald | Hold item: raises SP. ATK & SP. DEF of LATIOS & LATIAS. |
| FireRed / LeafGreen | An orb to be held by a LATIOS or LATIAS. It raises the SP. ATK and SP. DEF stats. |
| Diamond / Pearl · Platinum · HeartGold / SoulSilver | A wondrous orb to be held by LATIOS or LATIAS. It raises both the Sp. Atk and Sp. Def stats. |
| Black / White · Black 2 / White 2 | A wondrous orb to be held by Latios or Latias. It raises both the Sp. Atk and Sp. Def stats. |
| X / Y | A wondrous orb to be held by either Latios or Latias. It raises both the Sp. Atk and Sp. Def stats. |
| Sun / Moon · Ultra Sun / Ultra Moon · Let’s Go, Pikachu! / Let’s Go, Eevee! · Sword / Shield | A wondrous orb to be held by either Latios or Latias. It raises the power of Psychic- and Dragon-type moves. |
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