Duosion sits in the middle of its evolution line — stronger than Solosis but not yet at full power. Most trainers push through to Reuniclus as fast as possible. Only weak to Bug, Ghost, and Dark. Known as the Mitosis Pokemon.
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
VulnerableType-wise, Duosion takes extra damage from Bug, Ghost, and Dark. Not too many gaps in the chart, 3 weaknesses to account for.
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.
How to Evolve
Breed with Duosion to get Solosis eggs easily using 63 partners from the Indeterminate egg group.
The Sash lets Duosion ignore defensive shortcomings for one turn. Use that turn to deal early damage, and Magic Guard squeezes extra value from the position. Max HP and Sp. Atk EVs push damage output.
Best Build
Best Duosion Moveset
- Shadow Ball
- Psychic
- Trick Room
- Endeavor
Recommended Teammates
Most of Duosion's flexibility comes from TMs. Same-type output runs through Future Sight and Psychic, but Normal and Grass and the rest of the TM pool push it from predictable to genuinely threatening.
Level-Up Moves
TM Moves
Egg Moves
Tutor 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 Psychic for solid options.
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.
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.
No wild encounters for Duosion in Scarlet & Violet. Bring Solosis over from White, White 2, or Shield, then level through the stages. Each step in the chain is laid out below.
A few locations for Duosion with moderate rates across late-game routes. The sort toggle below swaps between best odds and earliest access, so you can approach it based on where you are in the game.
Where To Catch Duosion in Sword & Shield
To get Duosion, start by catching Solosis through walking encounters at Lv. 28-65. The chain covers 2 catchable stages before reaching the final form.
Step 1Catch SolosisEFFORTLESSGiant's Cap - 2OverworldLv.28-3050%MidHeavy FogEFFORTLESSGiant's Cap - 3OverworldLv.28-3250%MidHeavy FogEFFORTLESSGiant's CapOverworldLv.28-3040%MidHeavy FogEASYFrostpoint FieldGrassLv.60-6520%PostIceHeavy FogEASYSlippery SlopeGrassLv.60-6518%PostHeavy Fog
Step 2Duosion ✓MODERATEDusty BowlOverworldLv.42-4710%LateHeavy FogMODERATEFrostpoint FieldOverworldLv.60-6510%PostIceHeavy FogMODERATESlippery SlopeOverworldLv.60-6510%PostHeavy Fogor evolve from Solosis (Step 1)
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 starts showing up in late-game routes at moderate rates across 2 encounter spots. The list below is sorted so you can pick what fits your current progress without scrolling through everything.
Where To Catch Duosion in Sun & Moon
Step 1Obtain Solosis
Step 2Duosion ✓Route 16SunGrassLv.33LateRouteIsland Scan (Tuesday)Route 16MoonGrassLv.33LateRouteIsland Scan (Tuesday)or evolve from Solosis (Step 1)
At 370 BST, Duosion is firmly in pre-evolution territory. Evolve it into Reuniclus before bringing it to any serious fight.
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.
Duosion is a special attacker with base 125 Sp. Atk. But the speed tells the real story — base 30 Speed is low. Priority moves or Trick Room are the way to go. Fits the cannon role.
Duosion appears in 8 games, including Black & White, Black 2 & White 2, and X & Y.
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.
- Gen IY
Yellow - Gen IRB
Red & Blue - Gen IIGS
Gold & Silver - Gen IIC
Crystal - Gen IIIRS
Ruby & Sapphire - Gen IIIFRLG
FireRed & LeafGreen - Gen IIIE
Emerald - Gen IVPt
Platinum - Gen IVHGSS
HeartGold & SoulSilver - Gen IVDP
Diamond & Pearl - Gen VBWDebut
Black & White - Gen VB2W2
Black 2 & White 2 - Gen VIXY
X & Y - Gen VIORAS
Omega Ruby & Alpha Sapphire - Gen VIIUSUM
Ultra Sun & Ultra Moon - Gen VIISM
Sun & Moon - Gen VIILGPE
Let's Go Pikachu & Eevee - Gen VIIISwSh
Sword & Shield - Gen VIIIPLA
Legends: Arceus - Gen VIIIBDSP
Brilliant Diamond & Shining Pearl - Gen IXSV
Scarlet & Violet - Gen IXLZA
Legends: Z-A