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. Whichever head eats more than the other gets to be the leader.
After it has eaten up all the food in its territory, it moves to another area. Its two heads do not get along.
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, Dark Pulse and 7 more.
Hustle and Eviolite give Zweilous staying power beyond its evolution stage. Adamant nature boosts Attack, max Attack and Speed EVs set the spread, and the pre-evolution bulk actually works here.
Best Build
Best Zweilous Moveset
- Crunch
- Ice Fang
- Aqua Tail
- Outrage
Recommended Teammates
Hard to wall, honestly. Zweilous threatens 10 types beyond its own STAB, with Normal and Fire 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
You're catching Deino first, not Zweilous. Deino appears at solid rates in the encounters below. The step cards map the full 2-stage line with evolution methods between each stage.
How to Obtain Zweilous in Omega Ruby & Alpha Sapphire
To get Zweilous, start by catching Deino through walking encounters at Lv. 19-40. The chain covers 1 catchable stage before reaching the final form.
Step 1Catch DeinoEFFORTLESSMeteor Falls - Area 1Alpha SapphireGrassLv.1960%MidWaterDexNav chainEFFORTLESSMeteor Falls - Area 1Omega RubyGrassLv.1960%MidWaterDexNav chainEFFORTLESSMeteor Falls - Area 2Alpha SapphireGrassLv.4060%LateWaterDexNav chainEFFORTLESSMeteor Falls - Area 2Omega RubyGrassLv.4060%LateWaterDexNav chainEFFORTLESSMeteor Falls - Area 3Omega RubyGrassLv.4060%LateWaterDexNav chainEFFORTLESSMeteor Falls - Area 3Alpha SapphireGrassLv.4060%LateWaterDexNav chainEFFORTLESSMeteor Falls - Area 4Omega RubyGrassLv.4060%LateWaterDexNav chainEFFORTLESSMeteor Falls - Area 4Alpha SapphireGrassLv.4060%LateWaterDexNav chain
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