duosion
Generation V · #0578 — Mitosis Pokémon
Duosion, known as the Mitosis Pokémon, is a Psychic-type species introduced in Generation V that represents a pivotal stage in the evolution of Solosis. As National Pokédex number 578, Duosion marks the second evolution in its three-stage line, evolving from Solosis at level 32 and subsequently evolving into Reuniclus at level 41. This small, gelatinous creature stands at merely 0.6 meters (2'00") tall and weighs only 8.0 kilograms (17.6 lbs), making it one of the more diminutive Psychic-types available to trainers. Despite its unassuming size, Duosion possesses remarkable psychic capabilities that scale dramatically based on the synchronization of its dual minds. With a base stat total of 370, Duosion's distribution heavily favors its Special Attack stat of 125, positioning it as a specialized special attacker despite its overall modest power level for a mid-evolution Pokémon.
Base Stats
Height
0.6m
Weight
8.0kg
Category
Mitosis Pokémon
Gender
Male 50% / Female 50%
Color
green
Shape
ball
Abilities
Protects against damage from weather.
Protects against damage not directly caused by a move.
Heals for 1/3 max HP upon switching out.
Duosion Biology & Physical Characteristics
Duosion is a pale green Pokémon encased in a darker green, gelatinous membrane that gives it a distinctly amorphous appearance. The creature features a large, rounded head, short stubby arms extending from its sides, and a body that tapers to a point at the lower end. Its most distinctive facial features are its oval black eyes and a red, diamond-shaped mouth that hints at its alien nature. The gelatinous exterior forms small, round bumps on the lower sides and over Duosion's head, providing it with a bumpy, organic texture. Most notably, a small circular piece of matter floats freely within the gelatinous substance above Duosion's head, likely serving as a secondary neural processing center. The defining characteristic of Duosion's biology is its divided brain structure. According to Pokédex entries, Duosion's original unified brain has split into two distinct halves, each capable of independent thought and operation. When these two brains think in harmony, Duosion can exhibit extraordinary psychic power capable of traveling over half a mile away, making it a formidable telepathic entity. However, the two brains frequently operate at cross-purposes, leading to the erratic and unpredictable behavior documented in Shield's Pokédex entry, where it notes that the two halves rarely think alike.
Pokedex Numbers
Training
Breeding
Duosion Breeding, Gender Ratio & Egg Groups
Duosion exhibits a perfectly balanced gender ratio, with exactly 50% of individuals being male and 50% being female, allowing for straightforward breeding without gender complications. The species belongs to the Amorphous Egg Group, placing it alongside other gelatinous and blob-like Pokémon such as Grimer, Muk, Shellos, and Gastly. This categorization indicates that Duosion's reproductive biology, while not fully detailed in canon materials, operates on principles distinct from more physically defined Pokémon, likely reflecting its amorphous, gelatinous nature. Duosion has a base friendship value of 70 (in Generations V-VII; this was adjusted in later generations), indicating a moderately positive disposition toward trainers and relatively straightforward training compatibility. The species maintains a medium-slow growth rate, meaning it requires slightly more experience points than average to reach each successive level, resulting in a slower progression to its final evolution of Reuniclus at level 41. With a hatch counter of 20 cycles and the Amorphous Egg Group classification, breeding two compatible Duosion or breeding Duosion with other Amorphous group members will produce Solosis eggs, requiring approximately 4,884 to 5,140 steps to hatch depending on individual variation.
Held Items
Sprites
Held Items
persim-berry
medicine
Held: Consumed when confused to cure confusion.
Cost: 80
persim-berry
medicine
Held: Consumed when confused to cure confusion.
Cost: 80
TMs & HMs
tm03
x y
tm03
black 2 white 2
tm03
black white
tm03
sun moon
tm03
lets go pikachu lets go eevee
tm03
ultra sun ultra moon
tm03
omega ruby alpha sapphire
tm04
gold silver
tm04
emerald
tm04
firered leafgreen
tm04
ruby sapphire
tm04
diamond pearl
tm04
crystal
tm04
xd
tm04
heartgold soulsilver
tm04
black white
tm04
colosseum
tm04
platinum
tm04
sun moon
tm04
ultra sun ultra moon
+664 more TMs/HMs
duosion's Evolution Chain
Duosion Evolution, Mega Evolution & Special Forms
Duosion occupies a crucial transitional role within the Solosis evolutionary line, representing the intermediate stage between the base form and the powerful final evolution, Reuniclus. The evolution from Solosis to Duosion occurs at level 32, marking the point where the creature's singular brain begins its transformative split into two distinct halves. This evolutionary milestone correlates with a statistical rebalancing, where Duosion gains significant investment in Special Attack, increasing from Solosis's 90 base Special Attack to a more respectable 125, while maintaining similar durability through comparable HP and defensive stats. The subsequent evolution into Reuniclus occurs at level 41, where the dual-brain structure achieves complete development and full integration, resulting in substantially improved base statistics across the board, with Reuniclus boasting a base stat total of 490 compared to Duosion's 370. Unlike many other evolutionary lines, the Solosis family does not possess any Mega Evolution forms, regional variants, or alternative evolution methods such as held items or stone-based triggers. The progression from Solosis to Duosion to Reuniclus represents a purely level-based evolution chain, emphasizing the biological and psychological maturation of the species rather than external catalysts.
Where to Find
unova route 9
unova
+11 more
strange house
unova
+2 more
alola route 16
alola
Duosion Behaviour and Natural Habitat
The behavioral patterns of Duosion are profoundly influenced by its dual-brain physiology, resulting in one of the most unpredictable temperament profiles among Psychic-type Pokémon. During instances when the two divided brains fail to achieve cognitive synchronization, Duosion will suddenly attempt two entirely different actions simultaneously, creating a chaotic and often comical effect in battle or during daily activities. This internal conflict can lead to Duosion moving in contradictory directions, attempting incompatible moves, or pursuing divergent tactical objectives within the span of seconds. Conversely, when both brains achieve unified thought patterns and reasoning, Duosion's behavior becomes remarkably composed and its psychic abilities reach their apex, allowing for coordinated and powerful displays of mental power. In terms of habitat preference, Duosion inhabits regions that favor the Psychic-type ecosystem, typically found in caves, urban environments with strong psychic energies, or areas known to harbor other Psychic Pokémon. Its modest size and gelatinous composition suggest it may prefer cooler, more sheltered environments where evaporation would be minimized.
Pokedex Entries
Since they have two divided brains, at times they suddenly try to take two different actions at once.
When their two divided brains think the same thoughts, their psychic power is maximized.
When their brains, now divided in two, are thinking the same thoughts, these Pokémon exhibit their maximum power.
Since they have two divided brains, at times they suddenly try to take two different actions at once.
When their two divided brains think the same thoughts, their psychic power is maximized.
Since they have two divided brains, at times they suddenly try to take two different actions at once.
When their two divided brains think the same thoughts, their psychic power is maximized.
Its psychic power can supposedly cover a range of more than half a mile—but only if its two brains can agree with each other.
Its brain has split into two, and the two halves rarely think alike. Its actions are utterly unpredictable.
Duosion Name Origin & Design Inspiration
The name Duosion derives from the Latin prefix "duo," meaning two, combined with the suffix "-sion," which typically denotes action or state of being. In Japanese, Duosion is called Doublan (ダブラン), which similarly emphasizes the "double" nature of the creature through the "Dabu" (ダブ) prefix. The Mitosis Pokémon designation refers to the cellular division process, particularly fitting given that Duosion's core characteristic is its divided brain structure—essentially a biological mitosis or splitting of cognitive function. This thematic naming perfectly encapsulates the species' identity as a creature caught in a state of fundamental division. The design itself draws inspiration from cellular biology and the concept of cellular division, with Duosion's gelatinous, blob-like form resembling an amoeba or other single-celled organism undergoing mitosis. The floating spherical object within the gelatinous membrane may represent genetic material or a nucleolus, further emphasizing the biological mitosis theme. The color palette of pale and dark green suggests organic, plant-like qualities, possibly referencing chlorophyll or the biological life cycle, while the red diamond-shaped mouth provides a stark contrasting feature that catches the eye and emphasizes the creature's alien biology.
Learnable Moves
Duosion can learn 79 moves:
Move | Type | Cat. | Power | Acc. | PP |
|---|---|---|---|---|---|
| acid armor | poison | Status | — | — | 20 |
| after you | normal | Status | — | — | 15 |
| ally switch | psychic | Status | — | — | 15 |
| astonish | ghost | Physical | 30 | 100 | 15 |
| attract | normal | Status | — | 100 | 15 |
| calm mind | psychic | Status | — | — | 20 |
| charm | fairy | Status | — | 100 | 20 |
| confide | normal | Status | — | — | 20 |
| confuse ray | ghost | Status | — | 100 | 10 |
| confusion | psychic | Special | 50 | 100 | 25 |
| double team | normal | Status | — | — | 15 |
| dream eater | psychic | Special | 100 | 100 | 15 |
| embargo | dark | Status | — | 100 | 15 |
| encore | normal | Status | — | 100 | 5 |
| endeavor | normal | Physical | — | 100 | 5 |
| endure | normal | Status | — | — | 10 |
| energy ball | grass | Special | 90 | 100 | 10 |
| expanding force | psychic | Special | 80 | 100 | 10 |
| explosion | normal | Physical | 250 | 100 | 5 |
| facade | normal | Physical | 70 | 100 | 20 |
| flash | normal | Status | — | 100 | 20 |
| flash cannon | steel | Special | 80 | 100 | 10 |
| frustration | normal | Physical | — | 100 | 20 |
| future sight | psychic | Special | 120 | 100 | 10 |
| gravity | psychic | Status | — | — | 5 |
| guard swap | psychic | Status | — | — | 10 |
| gyro ball | steel | Physical | — | 100 | 5 |
| heal block | psychic | Status | — | 100 | 15 |
| helping hand | normal | Status | — | — | 20 |
| hidden power | normal | Special | 60 | 100 | 15 |
| imprison | psychic | Status | — | — | 10 |
| infestation | bug | Special | 20 | 100 | 20 |
| iron defense | steel | Status | — | — | 15 |
| light screen | psychic | Status | — | — | 30 |
| magic coat | psychic | Status | — | — | 15 |
| night shade | ghost | Special | — | 100 | 15 |
| pain split | normal | Status | — | — | 20 |
| power swap | psychic | Status | — | — | 10 |
| protect | normal | Status | — | — | 10 |
| psybeam | psychic | Special | 65 | 100 | 20 |
| psych up | normal | Status | — | — | 10 |
| psychic | psychic | Special | 90 | 100 | 10 |
| psychic terrain | psychic | Status | — | — | 10 |
| psyshock | psychic | Special | 80 | 100 | 10 |
| psywave | psychic | Special | — | 100 | 15 |
| rain dance | water | Status | — | — | 5 |
| recover | normal | Status | — | — | 5 |
| reflect | psychic | Status | — | — | 20 |
| rest | psychic | Status | — | — | 5 |
| return | normal | Physical | — | 100 | 20 |
| rock slide | rock | Physical | 75 | 90 | 10 |
| rock tomb | rock | Physical | 60 | 95 | 15 |
| role play | psychic | Status | — | — | 10 |
| rollout | rock | Physical | 30 | 90 | 20 |
| round | normal | Special | 60 | 100 | 15 |
| safeguard | normal | Status | — | — | 25 |
| secret power | normal | Physical | 70 | 100 | 20 |
| shadow ball | ghost | Special | 80 | 100 | 15 |
| shock wave | electric | Special | 60 | — | 20 |
| signal beam | bug | Special | 75 | 100 | 15 |
| skill swap | psychic | Status | — | — | 10 |
| sleep talk | normal | Status | — | — | 10 |
| snatch | dark | Status | — | — | 10 |
| snore | normal | Special | 50 | 100 | 15 |
| steel roller | steel | Physical | 130 | 100 | 5 |
| stored power | psychic | Special | 20 | 100 | 10 |
| substitute | normal | Status | — | — | 10 |
| sunny day | fire | Status | — | — | 5 |
| swagger | normal | Status | — | 85 | 15 |
| swift | normal | Special | 60 | — | 20 |
| telekinesis | psychic | Status | — | — | 15 |
| tera blast | normal | Special | 80 | 100 | 10 |
| thunder | electric | Special | 110 | 70 | 10 |
| thunder wave | electric | Status | — | 90 | 20 |
| toxic | poison | Status | — | 90 | 10 |
| trick | psychic | Status | — | 100 | 10 |
| trick room | psychic | Status | — | — | 5 |
| wonder room | psychic | Status | — | — | 10 |
| zen headbutt | psychic | Physical | 80 | 90 | 15 |
Duosion Competitive Battle Guide
In competitive Pokémon battles, Duosion occupies a niche role as a mid-evolution special attacker with specific utility functions rather than raw power. Its 125 base Special Attack stat provides respectable offensive presence, though trainers often opt for the significantly more powerful Reuniclus as their Psychic-type specialist due to its substantially higher 130 base Special Attack and improved overall statistics. Duosion's notable abilities provide distinct competitive advantages: Overcoat grants immunity to weather-induced damage, protecting against hazards like hail, sandstorm, and rain-based effects; Magic Guard prevents damage from indirect sources such as Stealth Rock, entry hazards, and weather, creating a defensive profile that discourages chip damage strategies. The hidden ability Regenerator heals Duosion for one-third of its maximum HP upon switching out, providing excellent survivability and allowing for consistent wall-breaking potential across multiple turns. Duosion's movepool includes valuable options such as Psychic, Psyshock, and Confusion for STAB attacks, supplemented by utility moves like Light Screen, Reflect, Ally Switch, and Recover for team support and survival. However, its disappointingly low 30 base Speed leaves it outsped by the majority of competitive threats, necessitating either priority move usage or team building around Speed control. As a result, Duosion typically sees use in lower-tier competitive formats and casual team building rather than the highest competitive tiers where Reuniclus dominates.
Commonly Asked Questions About Duosion
What type is Duosion?
Duosion is a psychic type Pokemon.
What does Duosion evolve into?
Duosion evolves into reuniclus.
What are Duosion's weaknesses?
Duosion is weak to bug, ghost and dark type moves.
Where can I find Duosion?
Duosion can be found in unova route 9 (unova), strange house (unova) and alola route 16 (alola).
Duosion Cultural Impact & Franchise History
Duosion has maintained a consistent but understated presence within Pokémon cultural discourse since its introduction in Generation V, often overshadowed by more prominent Psychic-type species and by its more visually distinctive evolved form, Reuniclus. The concept of a creature with two independent brains has resonated with fans who appreciate the scientific and philosophical themes embedded within Pokémon design, sparking discussions about cognition, identity, and the nature of consciousness. Duosion has appeared in various official Pokémon media, including the animated series where it occasionally features in episodes focusing on Psychic-type Pokémon or trainers specializing in mental abilities. The species' design has influenced discussions within fan communities about cellular biology and mitosis as inspiration for Pokémon concepts, often serving as a gateway into appreciating the deeper scientific themes present throughout the Pokédex. While not achieving the cultural prominence of iconic Psychic types like Alakazam, Espeon, or Gardevoir, Duosion has carved out a dedicated fan following among players who value the Solosis line for its unique aesthetic and conceptual approach to the dual-brain narrative. The creature has been featured in trading card games, merchandise, and spin-off games, maintaining consistent presence without achieving breakout mainstream recognition.
Where to Find Duosion in Every Pokémon Game
Duosion's availability across Pokémon games has varied considerably depending on the generation and version, though it consistently remains available as an evolution of the more readily encountered Solosis. In Pokémon Black and White, Duosion appears as Pokédex entry #084 in the regional Unova dex and can be obtained by evolving Solosis at level 32, with Solosis available in areas like the Celestial Tower and surrounding routes. In Pokémon Black 2 and White 2, Duosion's Unova dex number increased to #140, and Solosis availability remained consistent, allowing players to naturally progress through the evolutionary line. In Generation VI, Duosion appears in Pokémon X and Y within the Coastal Kalos region (entry #116), obtainable through natural progression with Solosis. The species continued availability in Pokémon Sword and Shield, where it appears as Pokédex entry #271 in the Galar dex and #55 in the Crown Tundra DLC, with Solosis available in various Wild Area locations. In Pokémon Scarlet and Violet, Duosion remains available as evolution of Solosis in the Paldea region, with access to Solosis in early game areas permitting mid-game evolution into Duosion. The species maintains a Catch Rate of 100, the maximum base catch rate possible, suggesting these creatures are exceptionally receptive to Poké Balls once encountered. As a non-legendary, non-mythical Pokémon with straightforward level-based evolution, Duosion has remained consistently accessible to players seeking to complete their Pokédex entries across generations.