|Some of the names in this Article use an unofficial English translation of its official Japanese Name.|
The name is obtained either by using Japanese translating programs or through previous existing English equivalent terms in the game. The names will be used as quick references around other articles in the Monster Hunter Wiki until Capcom reveals the official English names for them.
- Order: Saurischia
- Suborder: Wyvern Feet
- Infraorder: Shell Wyvern
- Superfamily: Flying Wyvern
- Family: Rath
Within the Old World, Dreadking Rathalos have been sighted in the Forest and Hills, Volcano, Ancestral Steppe, Volcanic Hollow, Jurassic Frontier, Ingle Isle, Sanctuary and Tower 3. In the New World, they've been seen in the Deserted Island.
Rathalos fear almost nothing else found in their habitat range, except other large predators and Elder Dragons. Rathalos may prey on lesser wyverns, particularly bird wyverns such as Jaggi, Velociprey and their alpha forms or pelagus such as Bullfango. Only certain predators in a Rathalos' territory are strong enough to fight back if a Rathalos is attacking. Foremost among them are other wyverns and large monsters that live in the same habitat. Such predators include Lagiacrus, Seregios, Tigrex, Gore Magala, Brachydios, Deviljho, Stygian Zinogre, Agnaktor, Lavasioth and the rare Rajang.
Dreadking Rathalos have many of the same adaptions as Rathalos, however, there is a few differences between them. Dreadking Rathalos are known to have darker-colored scales, giving them their additional name, Dreadking. Like the normal individuals, Dreadking Rathalos have high-flying capabilities, though these capabilities are taken to new heights. From the larger golden wings of Dreadking Rathalos, he is able to support himself better in the air than usual. These special Rathalos have even been found to be very resistant against Flash Bombs in the air, making them harder to hunt down. Unlike normal Rathalos, Dreadking Rathalos's poisonous claws are far more potent. Their poison is able to drain the strength of prey at a much quicker. Dreadking Rathalos's biggest feature is his ability to breath destructive fireballs on the ground. The fireballs are giant in size, allowing them to cover more ground in a single breath and can turn an area into a burning inferno. His fire is said to be able to burn all life that it touches, leaving the land around him scorched like a wildfire.
Dreadking Rathalos are truly dangerous monsters. The Hunter's Guild only allow hunters with special permits to hunt them down.