Unfortunately I haven't been able to find any information on where that crash could have happened. But I know it was as recent as fifty years ago. I'd suggest doing some digging if that's what you're passionate about! You sound like you like the cool stuff a lot.

A more common alien-y Pokemon outside of Starmie and Staryu is the Cleffa line. I read that they came on meteorites.

I have some ghosts if you are interested in those too, sugar.