[XY] fastest way to evolve pokemon

[boazisg]

I am tring to fill the national dex, and that hardest/ most tedious part seems to be evolving level up evolution pokemon. so what it the fastest way to do this. obvisously this depend on the level that it evolves, since if is level 10 just switch train 1 or 2 times at victory road, and le wow seems the fastest, but it is hard to not get them knocked out (I use darkrai with dark void) and for low level evolutions, you cant evolve many pokemon quikly, since they are bassicly wasting exp once they evolve. so basicly, what is the fastest way to evolve pokemon at each level range.