Shellos is technically a pre-evolution of Gastrodon, but it can still hold its own in battle. Storm Drain redirects Water moves and boosts its Sp. Atk, adding extra value. Only weak to Electric and Grass. Known as the Sea Slug Pokemon.
Nothing fancy in Shellos's spread. It leans mixed with HP out front. And you'll get 1 HP EV per KO for it. Follows a medium-fast 1M XP curve.
Beware of pushing strongly on its squishy body, as it makes a mysterious purple fluid ooze out.
Shellos Weakness
GoodType-wise, Shellos takes extra damage from Electric and Grass. The Water typing picks up 4 resistances to work with. Storm Drain grants an additional Water immunity, reshaping the matchup chart.
- Fairy type does not exist — Dragon has fewer checks
- Physical / Special split now per-move (introduced Gen IV)
Shellos is the base form in a two-stage line leading to Gastrodon. Check the evolution method below. A decent partner pool for breeding via two egg groups. Eggs are average hatch time. Evolving adds up to 150 stat points total.
How to Evolve
Breed Shellos easily with 31 breeding partners from the Indeterminate and Water1 egg groups. Pass egg moves like Amnesia, Counter, Curse and 7 more to offspring.
Best Build
No build content available for this Pokemon in Gen 4.
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Breeding's the move. Amnesia and Counter give Shellos options it can't learn any other way, and Ground and Normal coverage and more already covers a decent range on top of Muddy Water and Surf. The egg moves push it further.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
high spawn rates in early-game water routes across 12 locations. Shellos's one of the easier catches on the list. Two different catch methods are in play here. Knock it out fast and save your time for harder targets.
Best Locations
Shellos shows up in 12 surfing and walking spots from Lv. 9-30. Plenty of options, and the list is sorted so the highest-rate locations at each progression stage come first.
At 325 BST, Shellos is firmly in pre-evolution territory. Evolve it into Gastrodon before bringing it to any serious fight.
Shellos evolves into Gastrodon at level 30. Shellos is the base form of this evolutionary line.
Shellos gets Storm Drain, Sticky Hold, and Sand Force. But Storm Drain is the one that matters — it's the centerpiece of every viable set. Build around that.
Shellos is leaning toward the special side (base 57 Sp. Atk). But the speed tells the real story — base 34 Speed is low. Priority moves or Trick Room are the way to go.
Shellos appears in 13 games, including Platinum, HeartGold & SoulSilver, and Diamond & Pearl.
Debuting in Diamond & Pearl, Shellos appears in 13 games across 6 generations. A reliable presence in a solid number of games, typically found through catching or hatching as a base form.
- Gen IY
Yellow - Gen IRB
Red & Blue - Gen IIGS
Gold & Silver - Gen IIC
Crystal - Gen IIIRS
Ruby & Sapphire - Gen IIIFRLG
FireRed & LeafGreen - Gen IIIE
Emerald - Gen IVPt
Platinum - Gen IVHGSS
HeartGold & SoulSilver - Gen IVDPDebut
Diamond & Pearl - Gen VBW
Black & White - Gen VB2W2
Black 2 & White 2 - Gen VIXY
X & Y - Gen VIORAS
Omega Ruby & Alpha Sapphire - Gen VIIUSUM
Ultra Sun & Ultra Moon - Gen VIISM
Sun & Moon - Gen VIILGPE
Let's Go Pikachu & Eevee - Gen VIIISwSh
Sword & Shield - Gen VIIIPLA
Legends: Arceus - Gen VIIIBDSP
Brilliant Diamond & Shining Pearl - Gen IXSV
Scarlet & Violet - Gen IXLZA
Legends: Z-A