I've been thinking about something. Since there's some speculation that eevee might join the cast again this saga and that the shiny hunter from the golurk episode might become a recurring character and therefore a shiny Pokemon might get captured this saga, what if the eevee this time is shiny. It being shiny would differentiate it from that last 3 like how they made Lana's have a different hair style to make it stand out. With eevee's popularity and its standing as a secondary mascot with pikachu, im surprised that a shiny one hasnt appeared yet. There could be an episode where Karabari, ash and go compete to try and catch a shiny eevee.