A Psychic Flying Pokemon. It is the 249th Pokemon in the National PokeDex.
Ash: Hey, its a Pokemon. Lets see what Dexter(PokeDex) gotto say.
Dex: Lugia. A psychic flying Pokemon. Its psychic powers allows it to communicate with humans. No further nformations available.
Ash: Huh? Whatever it is, I gotto catch this Pokemon. I choose you! Goooo...Pikachu!