Are you able to soft reset for shiny mew?

Is it possible to soft reset the game for the mew at the beginning to be shiny? And if it is, will it be shiny the entire game?

I’m fairly sure that I remember someone a while back stating that they restarted their game after seeing that their Mew was a different color, thinking it was a bug. I do not believe it will remain shiny later in the game but I’ll have to double check to verify.

EDIT: Confirming that Mew will not necessarily remain shiny later in the game if it was shiny at the start.

You have a really good memory, Rocket.

Thanks :3c

Only for things that don’t apply to my field of study apparently, lmao