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Type Dark  Type Dragon
Species Hostile Pokémon
Abilities Hustle
Deino ← 634 → Hydreigon
Kanto N/A Johto N/A
Hoenn N/A Sinnoh N/A
Unova N/A Mountain Kalos 143
Evolves from Deino
Evolves into Hydreigon
(ジヘッド Jiheddo)
Generation V
Evolutionary line
No evolution line
50% ♂ / 50 % ♀
Weight Height
110.2 lbs 50.0kg 4'07" 1.4m
Pokédex color Egg group
Blue Dragon
Shape Footprint

Zweilous (Japanese: ジヘッド Jiheddo) is a Dark/Dragon-type Pokémon which was introduced in Generation V.



Like Deino, Zweilous is a blue dinosaur-like Pokémon, but after evolving, it gained a second head. Black fur covers both heads' necks and eyes. Two wings have also appeared after evolving. On the end of each front leg are two claws. It has a stubby tail and two feather-like "horns" on both of its heads. Its underbelly has two rows of magenta scales.


Zweilous is the evolved form of Deino as of level 50, and evolves into Hydreigon at level 64.

Game data

Game Locations

Version(s) Area(s) Rarity
Black/White Evolve Deino None
Black 2/White 2 N's Castle Rare
X/Y Victory Road Rare

Pokédex Entries

Pokédex Entries
Once it eats all the prey in its territory, it moves on to a different area. The two heads don’t get along.
Since their two heads do not get along and compete with each other for food, they always eat too much.
Black 2
The two heads do not get along. Whichever head eats more than the other gets to be the leader.
White 2
The two heads do not get along. Whichever head eats more than the other gets to be the leader.
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.
Omega Ruby
Alpha Sapphire


Leveling Generation V
Level Move Power Acc. PP Type Cat.
1 Double Hit 35 90% 10 Normal Physical
1 Dragon Rage 100% 10 Dragon Special
4 Focus Energy –% 30 Normal Status
9 Bite 60 100% 25 Dark Physical
12 Headbutt 70 100% 15 Normal Physical
17 Dragonbreath 60 100% 20 Dragon Special
20 Roar 100% 20 Normal Status
25 Crunch 80 100% 15 Dark Physical
28 Slam 80 75% 20 Normal Physical
32 Dragon Pulse 90 100% 10 Dragon Special
38 Work Up –% 30 Normal Status
42 Dragon Rush 100 75% 10 Dragon Physical
48 Body Slam 85 100% 15 Normal Physical
55 Scary Face 100% 10 Normal Status
68 Hyper Voice 90 100% 10 Normal Special
79 Outrage 120 100% 10 Dragon Physical
Bold indicates this Pokémon receives STAB from this move.
Italic indicates an evolved or alternate form of this Pokémon receives STAB from this move.


Black White Black 2 White 2 Back
Zweilous BW
Shiny Zweilous BW
X Y Omega Ruby Alpha Sapphire Back
Zweilous XY


In the anime

Two Zweilous made their debut in A Village Homecoming!, where one of them went on to evolve into a Hydreigon.


  • Zweilous evolves at the highest level of any Pokémon (level 64).
  • Its name appears to be combination of Zwei, the German word for the number 2 (referencing Zweilous' number of heads and its number on the evolution line) and jealous, since one head is always competing with the other. For instance if one head ate more than the other, the other would be jealous of the other.
    • Also, Zweil might also came from Zwilling, the German word for twin since Zweilous has two identical heads.
  • It seems to have a pair of wings growing or developing on its back. This would make sense because its evolved form Hydreigon has wings.
  • Basculin and Zweilous are the same species, both being Hostile Pokémon.
  • No Trainer in the Generation V games has Zweilous. It shares this trait with Rufflet, Vullaby, Mandibuzz, and Ferrothorn.
  • Zweilous is modeled after the Hydra in Greek and Roman mythology, and shares the multiple heads associated with the hydra.
  • Due to the fact that Hydreigon has visible eyes and a "frill" around its neck, it can be presumed that Zweilous and Deino have eyes underneath their "hoods".
  • Since Zweilous has only 2 wings, it still cannot fly, as opposed to Hydreigon, who must have 6 wings in order to fly properly.


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