While most trainers evolve Mareanie into Toxapex immediately, the unevolved form has a niche with Eviolite boosting its defenses. Only weak to Electric, Ground, and Psychic. Known as the Brutal Star Pokemon. Can go either physical or special depending on the set.
Mareanie's stats barely vary. 0 sit in respectable range with no real gaps. It's a blank slate for EV investment. Worth 1 Defense EV, medium-fast 1M XP curve to max.
It plunges the poison spike on its head into its prey. When the prey has weakened, Mareanie deals the finishing blow with its 10 tentacles.
It’s found crawling on beaches and seafloors. The coral that grows on Corsola’s head is as good as a five-star banquet to this Pokémon.
Mareanie Weakness
GoodMareanie's Poison/Water typing leaves it vulnerable to Electric, Ground, and Psychic moves. 8 resistances give it solid defensive coverage on top of that.
Mareanie evolves into Toxapex. It's a two-stage chain with the method shown below. No compatible partners for breeding via one egg group. Eggs are average hatch time. The evolved forms gain up to 190 total stats over Mareanie.
How to Evolve
Breed Mareanie easily from the Water1 egg group. Pass egg moves like Haze, Spit Up, Stockpile and 1 more to offspring.
Best Build
No build content available for this Pokemon in Gen 7.
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You'll want to breed for Haze and Spit Up on Mareanie. These egg moves aren't just nice to have. Combined with STAB from Sludge Wave and Sludge Bomb, they expand what Mareanie can actually threaten in practice.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
moderate rates across 6 locations for Mareanie in early-game fishing spots. Scroll the sorted list below and pick whichever spot sits closest to your current route. The rate differences between locations are worth comparing.
Best Locations
Bring Super Rod for Mareanie. There are 6 fishing encounters from Lv. 10-23 with no walking alternatives. Pick the spot with the best rate and settle in.
Mareanie isn't fully evolved, so it's not built for competitive play. You'll want to evolve it into Toxapex to unlock its full potential. At 305 BST, it's a stepping stone rather than a team anchor.
Mareanie evolves into Toxapex at level 38. Mareanie is the base form of this evolutionary line.
Run Regenerator on Mareanie. It's the ability that defines how you build around it and the main reason it holds a competitive niche. Mareanie also gets Merciless and Limber, but they don't compare.
Mareanie fills the balanced role. It's leaning toward the physical side (base 53 Attack). Base 45 Speed is low. Priority moves or Trick Room are the way to go. And it's fragile — can't afford to take many hits.
Mareanie can be found in Scarlet & Violet, Sword & Shield, Sun & Moon, and Ultra Sun & Ultra Moon.
Introduced in Sun & Moon, Mareanie has appeared in 4 games across 3 generations. Later debuts mean fewer total appearances, but it's been a consistent presence since its introduction.
- 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 IVDP

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 VIISMDebut

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
