I just love seeing "leaks" so much.
I don't really believe any of these are real. Chinese Leak 2.0 I would believe because the OG Chinese leak for SM was legit, but the fact it starts off with "I've played the full game" screams BS to me. Ultra Leaker looks like it could be possible. Mar?a Leaks is was too in depth to be legit, but the concept of their UB's are pretty cool, their other designs suck tho. Also "It learns Sweet Scent that heals half hp and raises sp.def."
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https://bulbapedia.bulbagarden.net/wiki/Sweet_Scent_(move)
The Anonymous 4chan Leak are too in depth too, and the Alolan Shuckle is based off some fan art I've already seen. Strange they're calling the "John Gamefreak III Esq. Leaks" real, the fact all the gym leaders are characters from SM raises a red flag for me, I would assume they'd at least bring in new characters for the roles.