Yes, i've never found one myself, but ive know several people that have.
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All shinies stay available once launched.
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Thank you!
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Just at a much lower rate, of course.
Also note: Only the lowest evolutionary stages and Pikachu are available as shiny.
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I got mine from a Magikarp raid.
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I've caught all 10 of mine in the wild (I live in a water biome!). I do know they can be raided though. I don't think Magikarp hatches from eggs anymore so that method is probably out, unless I'm mistaken.
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Took me 400 odd Karp (from its release) before I got a shiny on my main account
My alt acct on the other hand, it got one at the 19th one caught and then another at the 25th, with a shiny Absol in between. The saltiness was real haha. RNG can be a harsh mistress at times.
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I finally got mine. Field research. I believe it was transfer 10 pokemon.
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It's actually Catch 10 Pokemon. Transferring 10 gives you a Misdreavus.