Ho-Oh is a dual-type Fire/Flying Legendary Pokémon introduced in Generation II.
It is not known to evolve into or from any other Pokémon.
It is often considered to be closely related to Lugia as a duo, even sometimes as its polar opposite. Silver represents Lugia as "guardian of the seas", and Gold represents Ho-Oh as "guardian of the skies". Ho-Oh is also the trio master of the Legendary beasts.
Ho-Oh is the game mascot of Pokémon Gold and its remake Pokémon HeartGold, appearing on the boxart of both. It was also the first Generation II Pokémon revealed, in August 1996.
Ho-Oh has a mythical power to resurrect the dead. Ho-Oh was the only known Pokémon to learn Sacred Fire, its former signature move. It is said that when it flies its huge wings create bright, colorful rainbows. The rare few who bear witness to Ho-Oh are promised eternal happiness. Ho-Oh used to perch at the top of the Bell Tower until the Brass Tower was destroyed by fire. It now presumably flies through the world's skies in search of a Trainer with a pure heart.