Hardest Tier 5 raid boss to catch?

Moltres was by far the toughest for me. Will it stop moving all over the place!

Zapdos was the worst for me for some reason 10/19 there was something about him.

I hate kyogre.

The birds were weird to catch but I imagine I'd have an easier time with them now than I did last summer. Kyogre is miserable to catch and it takes forever. If it wasn't a good Pokemon, I'd just skip the catch phase for anything under 95%.

For me, the three worst are: Moltres, Lugia, Articuno. My catch rates were: 37%, 47% and 49%.

Rayquaza.

Most of the time I can't hit it. Literally - I throw as far as I can throw, and the ball goes up... then falls well short. Even when it's in the "lower" position.

And then I'll throw the ball exactly the same way and BAM! Excellent throw. And it jumps out. I've caught more Rayquaza with "Misses" than with "Excellents".

The Birds were tough for me as well, though I've changed my throw mechanics since then due to how bad a time I had of it with them, so if they came back, maybe my luck would be better.

Kyogre, only managed 33.3% catch rate where I have >80% on all other legendaries

Suicune, I was extremely unlucky with it, only 4/13. Also Kyogre, I had 5/12 or something.

RNG being what it is will likely result in people having different experiences with the different raid bosses. For me, it's Rayquaza. Had four in a row run on me yesterday, despite consistently hitting excellent throws 10-12 times on each one. Yet, another person who was raiding with me caught the same 4 within the first 3 throws.

I think the only one that was genuinely hard was Kyogre during it's first week or so when it was positioned so far back that a lot of people were barely able to hit it and excellent throws were nigh impossible for many.

This is basically my legendary list from worst to best catch rate:
1. Lugia (3/8, 0.375)
2. Suicune (9/16, 0.563)
3. Raikou (20/34, 0.588)
4. Zapdos (3/5, 0.600)
5. Entei (11/18, 0.611)
6. Groudon (23/34, 0.676)
7. Rayquaza (15/23, 0.682)
8. Moltres (11/15, 0.733)
9. Kyogre (20/27, 0.740)
10. Ho-Oh (11/14, 0.786)
11. Articuno (10/11, 0.909)
12. Mewtwo (5/5, 1.000)

The catch rates of Ho-Oh, Groudon, Kyogre, and Rayquaza get better (nearly 100% catch rate on Groudon and Rayquaza and a 100% catch rate on Ho-Oh and Kyogre) and the catch rate of Mewtwo gets worse (missed 1 out of 5) if you count the catches on my secondary account on my secondary device (started with Ho-Oh).

The Lugia catch rate is so bad because at that point I was still learning how to throw curve balls and Articuno was so much easier to hit. The dogs I stopped trying (using pinaps instead of golden razz) on low IV ones at some point, therefore the catch rate is lower than it could have been.

Rayquaza 100% for me!! Still don't have one due to missing/running away.

My worst is Lugia. 50%. And after they fixed the curve ball bug at the end of Raikou, my catch rate jumped to 75%+ for entei/suicune/groudon/kyogre. Ho-oh and rayquaza I’m at 90%. Got 75+ raids for all of the recent ones, so not much rng.

Didn’t have problem catching kyogre before they dumb it down. Was at 20/22 but it went downhill from there.

My catch rate is lowered when fatigue kicks in from chain raiding.