While he is not known to evolve into or from any Pokémon, he has a second Forme activated by using the Reflecting Mirror. His original Forme, Incarnate Forme, will then become Therian Forme.
His Therian Forme was officially revealed May 12, 2012.
In Incarnate Forme, Thundurus is a blue, muscular humanoid Pokémon, which resembles a genie. On his head is a single, long, sharp, purple horn. Thundurus has white, zigzagging and jutting styled hair, a spiky white mustache and two pointed blue ears on either side of his head. His eyes are yellow with beady white irises and no visible pupils. The front of Thundurus' body is covered in various, irregularly shaped purple spots. His broad chest consists of two joined, purple, rounded-diamond shaped pecks and his shoulders, elbows and navel are adorned with raindrop like designs. He has two spotted muscular arms, with five fingers on each hand. His lower body consists of a trailing cloud, with a thick, long, curling, purple, cable-like tail. Spanning the length of his tail, Thundurus has several ball-like structures. They are a dark grey color, and each has a long, sharp spike on one side.
In Therian Forme, Thundurus is a large, blue, sleek, bipedal snake or dragon-like Pokémon. The horn on his head is now thicker and extends out more, while his ears become more pointy and pinned back. Thundurus' hair remains the same; the mustache now takes on a more raised snout and fanged-maw-like appearance, with two curving wisps flowing back and pass his ears. His eyes remain yellow, but with larger irises which still lack visible pupils. His chest remains broad and unchanged, while his navel is bejeweled with a blue gem. Thundurus' arms have lose much of their muscular bulk, and are now slimmer. He has two paw-like hands, each covered in a trailing cloud-like fluff and with three claw-tipped fingers. Thundurus' purple lower half is much smaller then his upper body, and consist of two hind-legs and his tail. His feet are elongated, with three downward curved toes and claws. Thundurus' tail also remains largely unchanged, although it is thicker at the base and tapers off and becomes thinner toward the tip.
Gender differences
Thundurus is a male-only species with no female counterpart.
List of Japanese Nintendo event Pokémon in 2011#Milos Island Thundurus
[[List of local Japanese Wi-Fi (Black only) event Pokémon distributions in Generation List of Japanese Nintendo event Pokémon in 2011#Milos Island Thundurus#Milos Island Thundurus|Milos Island Thundurus]]
List of Korean Nintendo event Pokémon in 2011#Samroseuseom Thundurus
[[List of local Korean Wi-Fi (Black only) event Pokémon distributions in Generation List of Korean Nintendo event Pokémon in 2011#Samroseuseom Thundurus#Samroseuseom Thundurus|Samroseuseom Thundurus]]
Thundurus' species, the Bolt Strike Pokémon, shares its name with the move Bolt Strike in both Japanese and English; however, it cannot learn the move, which is Zekrom's signature move.
Although Thundurus is a Flying type, he doesn't learn any moves of this type through leveling up.
Origin
In Incarnate Forme, Thundurus is based on Raijin, the kami of thunder and lightning. It may also have drawn inspiration from genies.
In Therian Forme, Thundurus seems to be based on a reptile, most likely a snake or dragon. It may also draw inspiration from the Azure Dragon and/or Black Tortoise of the Chinese Four Symbols constellation, or from Quetzalcoatl, a god from the Aztec mythology that resembles a feathered serpent.
This Pokémon article is part of Project Pokédex, a Bulbapedia project that aims to write comprehensive articles on each Pokémon species, as well as Pokémon groups and forms.