There really isn't a quick way to get to level 100 fast without cheating. The best way would be to re-battle gym leaders and the elite four, along with wild pokemon. Sorry, you'll just have to be patient.
There is not really a easiest pokemon to evolve...but bug type pokemon evolve really fast
Easy really there are (or were) certain accounts people made for the exact purpose to level your Pokemon. First you would find tab that said "battle computer playor" enter thbase name and type of Pokemon you would like to level up. It would be like "Zedjarock", or "Zedjalightning", etc. some more effective than other. >_<
Defeating Pokemon that are a higher level that it, or Rare Candies.
there is no way, all you have to do is the slow boring way. sorry
cheat
There really isn't a quick way to get to level 100 fast without cheating. The best way would be to re-battle gym leaders and the elite four, along with wild pokemon. Sorry, you'll just have to be patient.
There isn't really a specific time to how fast your Pokemon level up. The younger the Pokemon(smaller the level) the faster they level up. also battles the Pokemon is in give it more experience. so if you wanted to level up a oddish and you gave it exp. share it would get less experience than if it was the first in the party/ battled the enemy Pokemon itself. If you trade what you want to train to a friend and give the Pokemon a lucky egg it well level up really quickly, only a few hours to wait and it will be level 100 in no time.
if you have already beaten the elite four than you can keep going there and training you Pokemon there. hope this helpz
Well, one way is fighting audinos. They give a lot of exp. (Depends on your level) Audinos will appear in moving grass. To get moving grass, you usually just stand outside a patch of grass and run back and forth until you see some.
Mii Channel
you should give it a lucky egg and put it at the front of your party while you face the elete 4
There is not really a easiest pokemon to evolve...but bug type pokemon evolve really fast
The Pokemon magikarp evolves into gyriados at level 20 just put an exp share on the magikarp to hold and the levels will shoot up really fast
try rare candies
Pokemon day care or put exp.share on a weak Pokemon
Get the Exp. Share and give it to the Pokemon you want to level up. Be sure to put in your first slot. When you find a battle substitute your Pokemon right away for one that is really good. Then make your opponent faint. Your Pokemon should earn alot of Exp. points. It will then level up!