Moltres is a large, avian Pokémon with golden plumage. It has a long, flowing head crest and a billowing tail, both made of reddish-orange and yellow flames. Additionally, its wings are also shrouded in fiery plumage. It has a long, thin neck, a pointed, brown beak, and small, triangular eyes. Its thin, brown legs have feet that have three forward-facing toes and one backward-facing toe. It has short talons.

Moltres sheds embers with every flap of its wings, creating a brilliant flash of flames. By dipping itself into the magma of an active volcano, this Pokémon can heal itself. It migrates from the south with the coming of spring, and is said to bring an early springtime to cold lands. There have been stories of Moltres using its wings to assist those lost in the mountains. Moltres is rarely seen.

Forms
Moltres has a regional form: Galarian Moltres.

In Galar, Moltres has a similar build, but a drastically different color scheme. Its body is primarily black with scarlet highlights and bright blue eyes. Its scarlet beak is hooked at the tip and leads to markings that run down its front and behind its head. Its feet are also scarlet with black talons. Its wings, crest, and tail are mostly black, with the crest having an extra curl at the front and the tail being split in two, and all three of these features exude a magenta, flame-like energy that earns it the name of its Kantonian counterpart. Its body apparently feels lukewarm to the touch.

The sinister energy that blazes from within its body is so oppressive that most Pokémon can't even approach it. Galarian Moltres attacks by spreading its wings wide to unleash its energy in a powerful aura that attacks the minds of its foes, inflicting deep fatigue as it burns away their energy from within. The aura has the power to consume the spirit of its victims, reducing them to burned-out shadows of themselves. It is said to have a haughty personality and a calm demeanor. It appears in the Crown Tundra once every few decades to reach Dyna Tree Hill.

(Source: Bulbapedia)