When I was organizing my team for the Elite Four and the whole playthrough of the game, I decided that a water type would fit nicely inside of my roster, so what other than one of the most underused water types in Generation Four, Lumineon. So I looked up where I could find Finneon and I went to that location, now get ready for some serious awesome right here.
I sent my Good Rod out into the water, I got a bite reeled it in, and I saw that my catch was a Finneon, except this Finneon had different colouring, sort of Brownish, with beige stripes, but I couldn't quite analyze it until it's actual fightsprite popped up, and there it was, sparkling with Brown. Threw a Quick ball at it, and it was mine, and the awesome part is, I wanted a Lumineon on my team, but I just so happened to get lucky enough to find a Shiny one. ;)