How do you know if a Pokemon is a legendary?

Answer 1

Most legendaries you can only catch one in the ENTIRE GAME. If u want to find out some legendaries then go Google it. Or u can buy some pokedex's and study them like i did. They aren't making another region. There is only five; Sinnoh, Johto, Kanto, Hoen, and i don't know the last one. It is only at least 50 legendaries. All of the other one's are not

Answer 2

Legendary pokemon are best known for being able to be only caught once in the game. There also best known for being the later entries in the pokedex. Typically these pokemon also feature higher statistics than common pokemon.

Depending on the game you are playing legendary pokemon also have a specific battle theme that plays whenever they appear. Starting in Pokemon Crystal legendary pokemon have gotten there own theme songs such as Suicune.