Answer 1

Both yes and no.
He's species, as PokéDex says, is Legendary.
But, if you mean legendary like eg. Mewtwo, then no.

Comments

It also saids that it is a Chinese Legendary on the Pokedex but it doesn't mean that it is Legendary any were else, so yes it is a Legendary at China and no Because it is not a Legendary to the entire World.