Zweilous is technically a pre-evolution of Hydreigon, but it holds its own in formats where Eviolite is allowed. Psychic moves can't touch it, which offsets the 5 weaknesses somewhat. Known as the Hostile Pokemon. Flexible enough to run physical or special sets.
Attack and HP carry most of Zweilous's stat budget. Speed's the obvious dump stat. Tough to catch and yields 2 Attack EVs. Follows a slow 1.25M XP grind.
The two heads do not get along at all. If you don’t give each head the same amount of attention, they’ll begin fighting out of jealousy.
The two heads have different likes and dislikes. Because the heads fight with each other, Zweilous gets stronger without needing to rely on others.
Zweilous Weakness
VulnerableType-wise, Zweilous takes extra damage from Fairy, Ice, Fighting, Bug, and Dragon. Watch out for Fairy attacks, those deal 4x damage. Psychic moves do nothing thanks to a full immunity. With 6 resistances, the defensive profile is strong.
Partway through Deino's chain. Zweilous still has another evolution ahead before reaching Hydreigon. For breeding, takes forever to hatch with no compatible partners via one egg group. HP has grown the most so far (+20), but there's still another 180 stats to gain in the final evolution.
How to Evolve
Breed with Zweilous to get Deino eggs from the Dragon egg group. Notable egg moves include Assurance, Astonish, Belch and 8 more.
Best Build
No build content available for this Pokemon in Gen 7.
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Hard to wall, honestly. Zweilous threatens 11 types beyond its own STAB, with Normal and Ghost standing out. Pair that with Draco Meteor and Outrage and switchins need to think twice.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Reminder Moves
Transfer Moves
No wild encounters for Zweilous in Ultra Sun & Ultra Moon. Bring Deino over from Black, Omega Ruby, or Scarlet, then level through the stages. Each step in the chain is laid out below.
How to Obtain Zweilous in Ultra Sun & Ultra Moon
Step 1Obtain DeinoCatch in the wild in:
Then trade to Ultra Sun & Ultra Moon to continue the evolution chain.
Also found in:
Step 2Zweilous ✓
Zweilous is meant to evolve into Hydreigon. At 420 BST, the stats aren't there for competitive play yet. Pre-evolution Pokemon rarely hold up against fully evolved threats.
Zweilous's biggest threats include Gardevoir (Fairy), Kyurem (Ice), and Machamp (Fighting), all carrying super-effective STAB moves. Gardevoir is the most dangerous since Fairy moves deal 4x damage. Bug and Dragon-type attackers are also a problem. With 5 weakness types, most competitive teams carry at least one counter.
Hustle is the go-to ability for Zweilous. It strengthens physical moves to inflict 1.5× damage, but decreases their accuracy to 0.8×. It's Zweilous's only ability.
At base 58 Speed, it won't be moving first often. On offense, Zweilous is a physical attacker with base 85 Attack. Defensively? Enough bulk to take a hit or two.
Zweilous appears in 8 games, including Black & White, Black 2 & White 2, and X & Y.
Zweilous joined the series in Black & White and has been available in 8 titles so far. With 5 generations of appearances, it's established itself despite the later start.
- 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