How to Evolve Mareanie

To evolve Mareanie into Toxapex, you must raise it to level 38. The evolution triggers automatically upon reaching this level through battle experience or consumable items. There are no secondary requirements such as friendship levels, held items, or specific weather conditions.

Using Exp. Candies L or XL obtained from Tera Raid Battles is the most efficient way to hit level 38 in modern generations. A single Exp. Candy XL grants 30,000 EXP, bridging the gap from mid-levels to 38 in seconds. If grinding manually, equip Mareanie with a Lucky Egg to increase total experience yield by 50%.

In Pokémon Scarlet and Violet, farming Chansey in North Province (Area Three) using a Normal Encounter Power sandwich accelerates the process. Chansey yields massive base experience, allowing Mareanie to hit the evolution threshold in just a few battles. Keep Mareanie in your party to benefit from the universal Exp. Share.

Do not evolve a Mareanie with Limber or Merciless if your goal is competitive play. Toxapex relies entirely on its Hidden Ability, Regenerator, to function as a top-tier defensive wall. Regenerator restores 33% of the Pokémon's maximum HP every time it switches out of battle.

This passive recovery is the cornerstone of Toxapex's pivot role, allowing it to absorb hits, set hazards, and switch out to heal without wasting a turn on Recover. Evolving a Mareanie with its Hidden Ability guarantees that the resulting Toxapex will also have Regenerator.

To obtain a Regenerator Mareanie, use an Ability Patch on a standard Mareanie. Alternatively, you can catch one directly from 4-star or 5-star Tera Raid Battles, which have a chance to yield Pokémon with their Hidden Abilities. Breeding a female Mareanie that has Regenerator passes the ability down to offspring with a 60% success rate.

Toxapex earns a definitive 9/10 rating in Singles formats and a 6/10 in Doubles/VGC. It is purpose-built for Balance and Stall teams that need a reliable answer to physical attackers and setup sweepers. Hyper Offense players should avoid Toxapex, as its severe lack of momentum will stall your own offensive pressure.

The primary advantage of evolving Mareanie is the massive stat jump. Toxapex boasts an oppressive 152 Base Defense and 142 Base Special Defense. Combined with its Poison/Water typing, it resists Fighting, Fairy, Fire, Water, Ice, Steel, Bug, and Poison attacks. It also absorbs Toxic Spikes simply by entering the field.

However, Toxapex is extremely passive. With base 53 Attack and Special Attack, it relies entirely on status conditions and chip damage to threaten opponents. It is highly susceptible to Taunt, which completely shuts down its utility moves. Ground-type attacks like Earthquake and Psychic-type attacks like Future Sight will force it off the field.

Once you hit level 38 and evolve Mareanie, you must optimize Toxapex's build to maximize its defensive utility. The standard EV spread is 252 HP / 252 Defense / 4 Special Defense paired with a Bold Nature. This maximizes physical bulk, allowing Toxapex to easily wall threats like Urshifu (Rapid Strike) and Mimikyu.

A mandatory move for Toxapex is Haze. Haze eliminates all stat changes on the field, entirely neutralizing setup sweepers that rely on Swords Dance or Dragon Dance. Recover is equally essential, providing reliable on-demand healing to supplement Regenerator.

• Toxic or Toxic Spikes: Essential for putting opposing Pokémon on a timer.
• Surf or Chilling Water: Prevents Toxapex from being completely passive. Chilling Water lowers the opponent's Attack stat, further increasing physical bulk.
• Baneful Bunker: Protects Toxapex while poisoning any opponent that makes contact.

For held items, Black Sludge is the optimal choice. It provides passive recovery every turn. More importantly, if an opponent uses Trick or Switcheroo to steal the item, the Black Sludge will actively damage them unless they are a Poison-type.

Haze is categorized as an Egg Move for the Mareanie line. In older generations, this meant you had to breed Mareanie with another Pokémon in the Water 1 egg group (like Quagsire) to inherit the move. This required planning before you even began leveling up to 38.

In Pokémon Scarlet and Violet, the Mirror Herb item bypasses the breeding requirement entirely. You can teach Haze to an already-evolved Toxapex in under a minute. Delete one move from Toxapex's moveset to leave an empty slot, and give it the Mirror Herb to hold.

Place Toxapex in a Picnic alongside a Pokémon that currently knows Haze, such as Palafin or Vaporeon. Wait a few seconds, end the Picnic, and Toxapex will have permanently learned Haze. This quality-of-life update allows you to evolve Mareanie immediately and fix its moveset later.

Toxapex forms half of the infamous "Regenerator Core" often seen in high-level competitive play. Pairing Toxapex with Amoonguss or Slowbro allows players to continuously pivot between bulky Pokémon, healing off damage without ever clicking a recovery move. This strategy exhausts the opponent's PP and patience.

To cover Toxapex's weaknesses to Electric and Ground, pair it with bulky Grass-types like Tangrowth or Ground-immune Pokémon like Corviknight. Corviknight can switch into Earthquakes aimed at Toxapex, while Toxapex absorbs the Fire-type attacks directed at Corviknight.

When selecting a Tera Type for Toxapex, Tera Steel and Tera Fairy are the premier defensive options. Tera Steel flips its Psychic weakness into a resistance and provides immunity to Poison. Tera Flying is a highly effective alternative, granting a direct immunity to the Ground-type attacks that traditionally threaten it.

Players occasionally question if an unevolved Mareanie holding an Eviolite is more durable than a fully evolved Toxapex. The Eviolite item boosts the Defense and Special Defense of unevolved Pokémon by 50%. Despite this multiplier, Mareanie falls mathematically short.

Mareanie possesses base 50 HP, 62 Defense, and 52 Special Defense. Even with a 1.5x boost from the Eviolite, its effective bulk is significantly lower than Toxapex's natural 50 HP, 152 Defense, and 142 Special Defense. The raw stat difference is too massive for the item to compensate.

Furthermore, relying on Eviolite locks Mareanie out of holding Black Sludge or a Rocky Helmet. Losing passive recovery or the ability to inflict chip damage on physical attackers ruins the Pokémon's utility. Evolving Mareanie at level 38 is objectively the only correct choice for competitive viability. Disclaimer: Pokedex.me is an unofficial fan-site and is not affiliated with Nintendo or Game Freak.