I caught a shiny Voltorb back in Emerald, eventually I lost it after transferring to Diamond and resetting my save.

It still lives on in my Pokemon Battle Revolution save (I think). Eventually Electrode became my favorite Pokemon so I miss my old shiny greatly.
I also managed to catch a shiny Boldore in White and shiny Paras in FireRed. It's been around 8 years since Paras with no other shinies.