Protosynthesis (Ability)

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Protosynthesis こだいかっせい
Ancient Activation
Flavor text
Generation IX
Boosts the Pokémon's most proficient stat in harsh sunlight or if the Pokémon is holding Booster Energy.

Protosynthesis (Japanese: こだいかっせい Ancient Activation) is an Ability introduced in Generation IX. It is the signature Ability of the ancient Paradox Pokémon with the exception of Koraidon.


In battle

0385Jirachi.png This Ability effect may be in need of research.
Reason: Check for other moves/Abilities that can or cannot copy/replace/suppress this Ability. Usual suspects: Simple Beam, Power of Alchemy, Mummy, Neutralizing Gas.
You can discuss this on the talk page.

When a Pokémon with Protosynthesis is in harsh sunlight or is holding Booster Energy, its highest stat (other than HP and taking into account stat stages, but not held items) is increased by 30%, or 50% if Speed is the highest stat. Upon activation, a message tells which stat is increased to all the players. If multiple stats are tied for highest, Protosynthesis breaks the tie by prioritizing Attack, Defense, Special Attack, Special Defense, and Speed, in that order.

Protosynthesis will activate in harsh sunlight even if the Pokémon is holding a Utility Umbrella, but not if a Pokémon with Air Lock or Cloud Nine is on the field. Harsh sunlight will activate Protosynthesis before a held Booster Energy, so the Booster Energy will not be consumed if the Pokémon with Protosynthesis is in harsh sunlight. If activated by weather, the effect of Protosynthesis will end when the field is no longer affected by harsh sunlight.

Skill Swap and Doodle will fail if either Pokémon has Protosynthesis. Worry Seed, Gastro Acid, Role Play, and Entrainment will fail if the target has Protosynthesis. Protosynthesis cannot be copied by Receiver and Trace or replaced by Lingering Aroma.

Outside of battle

Protosynthesis has no effect outside of battle.

Pokémon with Protosynthesis

# Pokémon Types First Ability Second Ability Hidden Ability
0984 Great Tusk Great Tusk
Ground Fighting Protosynthesis None None
0985 Scream Tail Scream Tail
Fairy Psychic Protosynthesis None None
0986 Brute Bonnet Brute Bonnet
Grass Dark Protosynthesis None None
0987 Flutter Mane Flutter Mane
Ghost Fairy Protosynthesis None None
0988 Slither Wing Slither Wing
Bug Fighting Protosynthesis None None
0989 Sandy Shocks Sandy Shocks
Electric Ground Protosynthesis None None
1005 Roaring Moon Roaring Moon
Dragon Dark Protosynthesis None None
1009 Walking Wake Walking Wake
Water Dragon Protosynthesis None None
0000 Raging Bolt Raging Bolt
Electric Dragon Protosynthesis None None
Please note that abilities marked with a superscript are only available in the stated generation or later.
  • For Generation III and IV games, ignore Hidden Abilities.


  • This Ability's name is a pun on photosynthesis.
  • The greatest difference between a Pokémon’s individual base stats so that this Ability can activate for any stat without external stat changes is 72 points. This assumes that maximum effort values, 31 individual values and a helpful nature was applied to the lowest stat and 0 effort and individual values with a hindering nature to the highest stat.
  • Because of how the stat calculations work due to their base stats, the following Pokémon cannot have Protosynthesis boost the following stat in battle without stat changes taking place, even with negative nature and 0 individual and effort values applied to their highest base stat:
    • Great Tusk cannot increase Special Attack or Special Defense as its Attack and Defense will always be higher.
    • Flutter Mane cannot increase Attack or Defense as the rest of its stats (both Special stats and Speed) will always be higher.
    • Roaring Moon cannot increase Special Attack as its Attack will always be higher.

In other languages

Language Title
Chinese Cantonese 古代活性 Gúdoih Wuhtsing
Mandarin 古代活性 Gǔdài Huóxìng
France Flag.png French Paléosynthèse
Germany Flag.png German Paläosynthese
Italy Flag.png Italian Paleoattivazione
South Korea Flag.png Korean 고대활성 Godae Hwalseong
Spain Flag.png Spanish Paleosíntesis

Variations of the Ability Protosynthesis
ProtosynthesisQuark Drive
Abilities affected by weather conditions
Sand VeilSwift SwimChlorophyllRain DishForecastSnow CloakDry SkinHydrationSolar PowerLeaf GuardIce BodyFlower GiftHarvestSand RushSand ForceSlush RushIce FaceProtosynthesisOrichalcum Pulse

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