the only legendary pokemon u can catch is mew after u've complete a quest. (u can find more about that in guide section)
All other legendaries u'll meet are not obtainable. u can fight, but not catch them :)
Btw.
Hey i'm HorrorKid91, rl Chris, and my favourite pokemon is Alakazam. :Cool:
Cheers
How if I failed to catch mew? can I have chance to catch it again? :D Thanks
btw my favorite pokemon it's Pikachu