I don't know how important others consider shiny to be, but to me, shinies are quite important. I find them to be more important than legendaries, in fact! Legendaries—you can get your hands on them pretty easily via in-game events. But as for shiny Pokémon, they all depend on luck. You could encounter shinies with the help from PokéRader, Masuda method, soft reset, etc., but those require a bit of a luck as well. So far, I've been able to run into shiny Pokémon for about five or six times. Shiny Litleo was the most recent. I've been able to encounter it on Route 22 at the beginning of Pokémon Y. (: I wasn't able to capture though, unfortunately. When I stumbled into this Pokémon, I was trying to weaken it up a bit, so that I'd be having an easier time when capturing. But when I landed an attack on it, it quickly became a critical hit, making it faint in an instant. If I had successfully caught it, though, then I definitely would have made it a part of my team.