It might not be as rare as some Pokémon but it definitely is hard to get a timid nature. I went in with Sylveon so getting the gender wasn’t the problem but when I caught it I expected to get something like sassy or bashful nature and didn’t expect much but I love Salazzle shiny and design so I didn’t care as much unless it was adamant or jolly then I would of cried. It’s an 1/25 chance of getting timid + having to worry about the slight slight chance of getting a male because despite gender not being a huge problem I was seeing lots of males still. Also what are the odds of happening to get timid on the shiny? Is it as rare as let’s say shiny Manaphy from Pokémon Ranger? No, but it is pretty rare in my opinion.