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.
Since they have two divided brains, at times they suddenly try to take two different actions at once.
When their brains, now divided in two, are thinking the same thoughts, these Pokémon exhibit their maximum power.
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.
- Fairy type does not exist — Dragon has fewer checks
- Physical / Special split now per-move (introduced Gen IV)
Duosion sits between Solosis and Reuniclus in this three-stage line. Not the final form yet. For breeding, average hatch time with a decent partner pool 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 45 partners from the Indeterminate egg group. Notable egg moves include Acid Armor, Astonish, Confuse Ray and 4 more.
Best Build
No build content available for this Pokemon in Gen 5.
Try selecting a different game/generation filter, or check back later.
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
Duosion starts showing up in late-game routes at high spawn 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 Black & White
Solosis is your first catch on the way to Duosion. You'll find walking encounters from Lv. 19-39 across 6 total spots in the chain.
Step 1Catch SolosisEFFORTLESSRoute 16GrassLv.19-22CommonMidRouteAnyEFFORTLESSRoute 5GrassLv.19-22CommonMidRouteAnyEFFORTLESSRoute 16GrassLv.22-25CommonMidRouteAnyDouble grassEFFORTLESSRoute 5GrassLv.22-25CommonMidRouteAnyDouble grass
Step 2Duosion ✓EFFORTLESSRoute 9GrassLv.31-34CommonLateRouteAnyEFFORTLESSRoute 9GrassLv.36-39CommonLateRouteAnyDouble grassor 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