Protosynthesis (Ability)

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

  This Ability effect may be in need of research.
Reason: Check for other moves/Abilities that can or cannot copy/replace/suppress this Ability: Mummy, Wandering Spirit. Check if Neutralizing Gas works/doesn't work and when, if ever, it changes from not working to working.
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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. Protosynthesis's stat increase cannot be passed by Baton Pass.

Skill Swap and Doodle will fail if either Pokémon has Protosynthesis. Gastro Acid and Role Play will fail if the target has Protosynthesis; however, Simple Beam and Worry Seed will work. Protosynthesis cannot be copied by Receiver, Trace and Power of Alchemy or replaced by Lingering Aroma. If a Pokémon obtains Protosynthesis with Imposter or Transform, the Ability will not activate regardless of if the Pokémon is in harsh sunlight or holding a Booster Energy.

Outside of battle

Protosynthesis has no effect outside of battle.

Pokémon with Protosynthesis

# Pokémon Types First Ability Second Ability Hidden Ability
0984   Great Tusk
Ground Fighting Protosynthesis None None
0985   Scream Tail
Fairy Psychic Protosynthesis None None
0986   Brute Bonnet
Grass Dark Protosynthesis None None
0987   Flutter Mane
Ghost Fairy Protosynthesis None None
0988   Slither Wing
Bug Fighting Protosynthesis None None
0989   Sandy Shocks
Electric Ground Protosynthesis None None
1005   Roaring Moon
Dragon Dark Protosynthesis None None
1009   Walking Wake
Water Dragon Protosynthesis None None
1020   Gouging Fire
Fire Dragon Protosynthesis None None
1021   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 natures 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.
    • Brute Bonnet cannot increase Speed, as its Attack 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
  French Paléosynthèse
  German Paläosynthese
  Italian Paleoattivazione
  Korean 고대활성 Godae Hwalseong
  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

  This article is part of Project Moves and Abilities, a Bulbapedia project that aims to write comprehensive articles on two related aspects of the Pokémon games.