Reshiram/Zekrom

[Aurethious]

Are they easier to catch than every other legendary in the history of legendaries or did I just get really lucky? I caught both using only 2 Ultra Balls, no status effects, and more than a sliver of HP left. Maybe it's just been a while since I tried to catch a legendary, but I don't ever remember it being that easy.

[CommodoreSkippy]

My brother chucked a single luxury ball at Zekrom, full health, and caught it.

I, uh... maybe he's just incredibly lucky?

Took me dozens of ultra and dusk balls to catch a 1hp, sleeping Ho-oh last game.

[Heleor]

I think since it's a story battle, it's easier. If you knock it out, I think it comes back too.

[Blackfox138]

I don't totally understand catch rates, but Reshi/Zek have a catch rate of 45. Farfetch'd also has a catch rate of 45. Therefore, Reshi/Zek are as hard to catch as Farfetch'd.

Oh look, a link to catch rate info.
http://bulbapedia.bulbagarden.net/wiki/Catch_rate

[Darxio]

I knocked Reshiram to half health and caught it in one shot with a Heal Ball.

Be sure to try and check the IVs during the fight(If you're into that). You can't check out the dragons until after you win fully, where it just auto saves it anyway.

Luckily my Reshiram has some pretty nice IVs, nothing perfect but everything in the high 20s. Sadly a quirky nature.

[Ktywf]

Yeah I noticed having a much easier time catching Zekrom than any legendary also. And now I understand why. A 45 catch rate is 15 times higher than the standard catch rate for a legendary. And just my luck, it STILL took me about 15 tries.

[Argent]

A managed to catch my Zekrom on the first try. I can't remember if it was the first ball I threw or not.
I wasn't looking for natures or IVs.
What I didn't like was how the game auto-adds the legendary to the start of your team (if you had a space/brought it from the box.)
That really threw off my rhythm and it didn't help that Ghestis was cheating...