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.
They eat Corsola branches, so Mareanie are hated by craftsmen who work with Corsola branches that have naturally fallen off.
Aside from its head, its body parts regenerate quickly if they’re cut off. After a good night’s sleep, Mareanie is back to normal.
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.
Try selecting a different game/generation filter, or check back later.
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 Gunk Shot and Sludge Wave, they expand what Mareanie can actually threaten in practice.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Mareanie starts showing up in early-game fishing spots at moderate rates across 10 encounter spots. The list below is sorted so you can pick what fits your current progress without scrolling through everything.
Best Locations
Mareanie is a fishing-only catch in this game. 10 spots at Lv. 10-23 using Super Rod, so bring the right rod and check the rates on each location.
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 support 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
