Or just pay attention? Spoonfeeding takes the fun out of things. And I'm saying this as someone who's killed/run from shinies. I lost those cause of my stupidity and honestly, I'd hate it if there was a thing like "Hey, you found a shiny! [Confirm]", that's overkill in terms of handholding lol. Losing shinies or making sure you get them is part of the hunt. Pay attention :)
I hunt while watching movies, talking to people, studying, doing homework etc, and I still don't want that cause what's the point if the game just holds your hand like that?