Stats & Training
The stat bars tell the story: Sp. Atk carries everything and Speed's dead weight. But this Mitosis Pokemon still yields 2 Sp. Atk EVs per fight on a 1.06M XP medium-slow curve.
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 Weakness
Type-wise, Duosion takes extra damage from Bug, Ghost, and Dark. Not too many gaps in the chart, 3 weaknesses to account for.
| Damage | Types |
|---|---|
| 2x (Weak) | Bug, Ghost, Dark |
| 0.5x (Resist) | Fighting, Psychic |
 Greninja WaterDark | A | |
Available Moves Moves
Damage vs Duosion View Greninja builds →Dark Pulse 2x101-120%KO Night Slash 2x94-111%KO U-turn 2x63-74% Feint Attack 2x81-96% | ||
 Incineroar FireDark | A | |
Available Moves Moves
Damage vs Duosion View Incineroar builds →Darkest Lariat 2x134-159%KO Throat Chop 2x125-148%KO Leech Life 2x84-99% Dark Pulse 2x84-99% | ||
 Tyranitar RockDark | B | |
Available Moves Moves
Damage vs Duosion View Tyranitar builds →Dark Pulse 2x94-111%KO Crunch 2x144-169%KO Shadow Claw 2x84-99% Bite 2x109-129%KO | ||
 Krookodile GroundDark | B | |
Available Moves Moves
Damage vs Duosion View Krookodile builds →Foul Play 2x151-178%KO Crunch 2x127-150%KO Dark Pulse 2x71-84% Shadow Claw 2x75-89% | ||
 Guzzlord DarkDragon | C | |
Obtain MethodUltra Space Interact Encounter Available Moves Moves
Damage vs Duosion View Guzzlord builds →Crunch 2x113-133%KO Dark Pulse 2x96-114%KO Shadow Claw 2x66-79% Steamroller 2x61-73% | ||
In Ultra Sun & Ultra Moon, Chandelure can KO Duosion with Shadow Ball (159-187%). Hydreigon threatens a KO with Dark Pulse (143-168%). Volcarona deals 47-56% with Giga Drain.
 Chandelure GhostFire | A | |
Recommended Build AbilityFlame Body ItemLeftovers NatureTimid Moves
Damage vs Duosion View Chandelure builds →Shadow Ball 2x159-187%KO Flamethrower89-105%KO | ||
 Hydreigon DarkDragon | A | |
Recommended Build AbilityLevitate ItemChoice Scarf NatureTimid Moves
Damage vs Duosion View Hydreigon builds →Draco Meteor115-136%KO Dark Pulse 2x143-168%KO U Turn 2x61-72% | ||
 Volcarona BugFire | A | |
Recommended Build AbilityFlame Body ItemLeftovers NatureTimid Moves
Damage vs Duosion View Volcarona builds →Giga Drain47-56% | ||
 Genesect BugSteel | B | |
Recommended Build AbilityDownload ItemChoice Scarf NatureNaive Moves
Damage vs Duosion View Genesect builds →U Turn 2x119-141%KO Ice Beam50-59% Flamethrower50-59% | ||
Ultra Sun & Ultra Moon Evolution
Duosion sits between Solosis and Reuniclus in this three-stage line. Not the final form yet. For breeding, average hatch time with plenty of partners via one egg group. HP has grown the most so far (+20), but there's still another 120 stats to gain in the final evolution. View every chain in the Evolution Chart.
How to Evolve
Breeding
Breed with Duosion to get Solosis eggs easily using 52 partners from the Indeterminate egg group. Notable egg moves include Acid Armor, Astonish, Confuse Ray and 5 more.
Ultra Sun & Ultra Moon Duosion Best Moveset
Best Build
No build content available for this Pokemon in Gen 7.
Try selecting a different game/generation filter, or check back later.
Moves
The egg pool carries weight here. Acid Armor and Astonish aren't available any other way for Duosion, and they meaningfully change what it threatens. Stack those on top of Future Sight and Dream Eater for solid options.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Transfer Moves
How to Get Duosion in Ultra Sun & Ultra Moon
Duosion can't be caught in Ultra Sun & Ultra Moon. Transfer Solosis from White, White 2, or Shield and evolve through the 2-stage line to get it. The step cards below map the full chain.
Duosion Guide
At 370 BST, Duosion is firmly in pre-evolution territory. Evolve it into Reuniclus before bringing it to any serious fight.
In Ultra Sun & Ultra Moon, Duosion's biggest threats include Heracross (Bug), Chandelure (Ghost), and Tyranitar (Dark), all carrying super-effective STAB moves. At base 30 Speed, Duosion won't outrun any of these threats so switching to a resist is usually the safer play.
Duosion gets Magic Guard, Overcoat, and Regenerator. But Magic Guard is the one that matters. It's the centerpiece of every viable set. Build around that.
In Ultra Sun & Ultra Moon, Regenerator is the hidden ability. It heals for 1/3 max HP upon switching out. Worth hunting for if you want Duosion to compete at a higher level.
Game Availability
Since Black & White, Duosion has been obtainable in 8 games. A Generation 5 debut means a shorter history, but Duosion has appeared steadily across every generation since.
Click a game to view version-specific details
- Gen 1Y
Yellow - Gen 1RB
Red & Blue - Gen 2GS
Gold & Silver - Gen 2C
Crystal - Gen 3RS
Ruby & Sapphire - Gen 3FRLG
FireRed & LeafGreen - Gen 3E
Emerald - Gen 4Pt
Platinum - Gen 4HGSS
HeartGold & SoulSilver - Gen 4DP
Diamond & Pearl - Gen 5BWDebut
Black & White - Gen 5B2W2
Black 2 & White 2 - Gen 6XY
X & Y - Gen 6ORAS
Omega Ruby & Alpha Sapphire - Gen 7USUM
Ultra Sun & Ultra Moon - Gen 7SM
Sun & Moon - Gen 7LGPE
Let's Go Pikachu & Eevee - Gen 8SwSh
Sword & Shield - Gen 8PLA
Legends: Arceus - Gen 8BDSP
Brilliant Diamond & Shining Pearl - Gen 9SV
Scarlet & Violet - Gen 9LZA
Legends: Z-A - Gen 10WW
Winds & Waves