Effect

Evolves an Eevee into Vaporeon, a Lombre into Ludicolo, a Panpour into Simipour, a Poliwhirl into Poliwrath, a Shellder into Cloyster, or a Staryu into Starmie.

Where to find it

In each game: where the item shows up once (on the ground, as a gift, as a reward) and where you can always get it (shops, wild Pokémon holding it, prizes).

  1. Red / Blue · Yellow

    Always
    • Celadon Department Store

  2. Gold / Silver · Crystal

    Once
    • Sea Cottage (from Bill's grandfather)
    Always
    • Mystery Gift, Route 42 (gift from Fisherman Tully) (C)

  3. Ruby / Sapphire · Emerald

    Once
    • Abandoned Ship
    Always
    • Route 124 (trade for Blue Shard with Treasure Hunter)

  4. FireRed / LeafGreen

    Once
    • Seafoam Islands (×2)
    Always
    • Celadon Department Store

  5. Colosseum

    Always
    • Trade

  6. XD: Gale of Darkness

    Once
    • Phenac Stadium, Gateon Port
    Always
    • Trade

  7. Diamond / Pearl · Platinum

    Once
    • Routes 213 and 230 (Pt), Solaceon Ruins (Pt)
    Always
    • Underground

  8. HeartGold / SoulSilver

    Once
    • Seafoam Islands, Sea Cottage (from Bill's grandfather)
    Always
    • Route 42 (gift from Fisherman Tully), Bug-Catching Contest first prize (post-National Pokédex), Pokéathlon Dome (2500 Pts.)[Mo][Tu][We][Fr]

  9. Black / White

    Once
    • Castelia City, Driftveil City
    Always
    • Dust clouds, Black City (B)/White Forest (W) (Ralph)

  10. Black 2 / White 2

    Once
    • Route 19, Clay Tunnel
    Always
    • Battle Subway/Pokémon World Tournament (3 BP), Join Avenue (Antique Shop), White Forest (Store 2), Funfest Missions
    • Dust clouds (Chargestone Cave, Mistralton Cave, Clay Tunnel, Twist Mountain, Underground Ruins, Victory Road, Wellspring Cave, Seaside Cave, Giant Chasm)
    • Hidden Grottoes (Routes 2, 3, 5, 6, 7, 9, 13, 18, 22, and 23; Floccesy Ranch; Giant Chasm; Abundant Shrine; Lostlorn Forest; Pinwheel Forest)
    • Transfer from Dream Radar

  11. X / Y

    Once
    • Routes 8 and 12
    Always
    • Lumiose City (Stone Emporium), Secret Super Training (The Water Stone Cup Begins!, The Battle for the Best: Version X! (X), and The Battle for the Best: Version Y! (Y)), Route 18 (from Psychic Inver)
    • Spiky rocks

  12. Omega Ruby / Alpha Sapphire

    Always
    • Route 124 (trade for Blue Shard with Treasure Hunter), Mauville City (Inverse Battle Stop), Secret Super Training (The Water Stone Cup Begins!, The Battle for the Best!), Route 106 (rematch with Fisherman Elliot), Secret Base ("Pick up stones" with Secret Pal)

  13. Sun / Moon · Ultra Sun / Ultra Moon

    Once
    • Route 8, Paniola Ranch (USUM)
    Always
    • Konikoni City, Poké Pelago (Isle Aphun - Brilliant-Stone Hunting, Interesting-Item Hunting)

  14. Let's Go Pikachu / Eevee

    Once
    • Routes 12 and 21
    Always
    • Celadon Department Store
    • Found by Rock-type walking Pokémon (Rock Tunnel)

  15. Sword / Shield

    Once
    • Route 2, Bridge Field
    Always
    • Hidden recurring item (Lake of Outrage)
    • Bridge Field (Digging Duo)
    • Poké Job reward (Tiers III, IV, and IX)

  16. Isle of Armor

    Always
    • Hidden recurring item (Courageous Cavern)

  17. Crown Tundra

    Always
    • Hidden recurring item (Roaring-Sea Caves)
    • Max Raid Battles (Ballimere Lake)

  18. Brilliant Diamond / Shining Pearl

    Once
    • Route 213
    Always
    • Grand Underground

  19. Legends: Arceus

    Always
    • Blue ore deposits (Obsidian Fieldlands, Crimson Mirelands, Cobalt Coastlands)
    • Trading post (1,000 MP)
    • Ginkgo Guild cart (randomly sold by Ginter, as "Water-Droplet Rock")
    • Space-time distortions

  20. Scarlet / Violet

    Once
    • Cascarrafa, Area Zero, South Province (Area Four)
    • Reward for registering 80 Pokémon in the Paldea Pokédex
    Always
    • Delibird Presents (after earning 3 Gym Badges)
    • Tera Raid Battles (1★, 2★, 3★, 4★, 5★)
    • Sparkling overworld item (East Province (Area One), East Province (Area Two), North Province (Area One), North Province (Area Three))

  21. Teal Mask

    Once
    • Fellhorn Gorge
    Always
    • Sparkling overworld item (Kitakami Road)

  22. Indigo Disk

    Always
    • Sparkling overworld item (Coastal Biome)
    • Item Printer

  23. Legends: Z-A

    Always
    • Stone Emporium

Source: Bulbapedia (CC BY-NC-SA)

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