well based on how long hes had Bagon, it should, relatively soon, evolve into Shelgon. Im also one to believe that when it comes to abilities, we can all be sensible i.e. you cant spam Hyperbeam a million times in a row. i had the battle vision of Drillbur transitioning form dig attack into Drill Run. In all honesty, i cnat speak for everyone's pokemon ,cause their pokemon journeys may have began at all different times, but it feels as though everyone is due for an evolution soon.