Originally Posted by twistedspoon
it all just really involves getting the legend down to low hp and statusing it.
l've encountered pokemon who're harder to catch than legends 0:
You must mean Beldum, Metang, and Metagross which have the same catch rate as Legendaries.
But not all Legendaries are hard to capture. There are Palkia, Dialga, Reshiram, and Zekrom whose catch rate are high enough.