It is not known to evolve into or from any other Pokémon.
It is said to be an ancient relative of MegaSalamence or a counterpart of it from a parallel timeline.
Biology
Roaring Moon standing on the ground
Roaring Moon is a quadrupedal, draconic Pokémon with a long, tapering tail. It is primarily blue with a red underside with four yellow markings. There are red markings on the underside of its tail, and stripes on the inner surface of its hind legs. Additionally, there are raised white ridges above its eyes. Jagged, light blue spikes protrude from either side of its head. Its mouth features sharp teeth, with a pair of three teeth on the upper jaw and a pair of single teeth in the lower. Each of its legs has three, long claws, with its front legs being longer and bulkier, and sporting three protruding scales close to the knees. On its back rests very large red wings that begin with a three-pronged yellow pattern on both sides, that then curl upward into a crescent moon-like shape which gives the Pokémon its name, with blue-tipped feather-like protrusions on the ends. Below its wings is a jagged cape-like structure with a black underside.
According to an article from an April issue of Occulture magazine, Roaring Moon is named after a similarly described being in the Scarlet Book. The article says it looks similar to Salamence that has undergone a certain phenomenon that occurs elsewhere in the world, but it's unclear if there is any connection. It's said that Roaring Moon scatters feathers as it flies around at high speeds seeking prey. It's thought to be more savage than Salamence and that it should be avoided at all costs.
According to AI Sada, Roaring Moon is an ancient Pokémon related to Salamence. However, according to a version of Professor Sada that appeared at the Crystal Pool, Roaring Moon is a counterpart of Salamence from another timeline. Its true origin is unknown. Roaring Moon was brought to the depths of Area Zero by a time machine built by Professor Sada ten years ago. 200 years ago, Heath also encountered Roaring Moon, as seen in the Scarlet Book, though it is unclear how it arrived there at the time.
Game data
Pokédex entries
This Pokémon was unavailable prior to Generation IX.
Both are not covered in any editions of Occulture magazine in the Naranja AcademyS/Uva AcademyV entrance hall, with the editions covering them being found in the lab on Poco Path instead.
Both possess a weakness and resistance to their own type attacks. Roaring Moon, Dragon/Dark, is weak to Dragon and resistant to Dark; Iron Valiant, Fairy/Fighting, is weak to Fairy and resistant to Fighting.
Origin
Roaring Moon is based on Salamence, specifically its Mega Evolved form. By extension, it also appears to be based on European dragons. Its feathers are similar to those of feathered dinosaurs. The shape of its wings resembles a crescent moon, commonly used as an icon in Islamic societies such as Al-Andalus (the regions of Iberia that were under Muslim rule in the Middle Ages). The ridged white part on top of its head is vaguely reminiscent of Bagon's protective growth.
Name origin
Roaring Moon is literally roaring moon.
Todorokutsuki can be taken literally as 轟く月 todoroku tsuki (roaring moon).
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.