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'(ジヘッド Jiheddo)'
Hostile Pokémon Pokémon
Ability Gender
Hustle 50% ♂/50% ♀
Pokédex color Egg groups
Black Unknown
Weight Height
50.0kg ??? 1.4m ???
Body style Footprint
BodyUnknown.png F634.png
Azurilland Pokédex
HP Attack Defense
72 85 70
Sp. Attack Sp. Defense Speed
65 70 58

Zweilous (Japanese: ジヘッド Jiheddo) is the evolution of Deino, and the pre-evolution of Hydreigon. It now has two heads. It evolves into Hydreigon at level 64, therefore it is one of the hardest dragon type Pokémon to evolve.


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.

Game Info

Game Locations

Version(s) Location
Black/White Evolve Deino

Pokédex Entries

Generations I - IV
Zweilous did not appear during the Generation I - IV games.
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
White 2
Omega Ruby
Alpha Sapphire


Level Move Power Accuracy PP Type Damage Type Contest Type Appeal Jam
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.


I Red Blue Yellow Red (JP) Green (JP) Back
Zweilous did not appear in Generation I
II Gold Silver Crystal Back
Zweilous did not appear in Generation II
III Ruby Sapphire Emerald FireRed LeafGreen Back
Zweilous did not appear in Generation III
IV Diamond Pearl Platinum HeartGold SoulSilver Back
Zweilous did not appear in Generation IV
V Black White Black 2 White 2 Back
Zweilous BW.gif Zweilous BW Back.gif
Shiny Zweilous BW.gif File:Shiny Zweilous BW Back.gif


  • 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 have 2 heads and they are twins.
  • It seems to have a pair of wings growing or developing on its back.
  • 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.