Yes, I've personally tried it myself.
If you leave Dusk Form Lycanroc with a Ditto in the daycare, they will produce an egg. If the Lycanroc is holding an Everstone, it will produce a Rockruff with Own Tempo, which will evolve into Dusk Form Lycanroc. I haven't tried it without the Everstone tho.
I put my special Rockruff in the GTS. If you want it, then here's the info
It is English
It is nicknamed Second Dusk
It is level 1 (apparently because it hatched from an egg)
I want a Mewtwo.
It has the OT Mushu, which is my Ultra Moon OT.
It is not a scam. See it's summary. It has Own Tempo as it's ability.