Unfortunately, the answer is no - unless, of course, you feed them Rare Candies. The only way to do it is through cheating - which I highly do not recommend - or by good, hard work. Have a Pokemon hold lucky egg it will receive more exp in battle!
Leveling up pokemon gets easier if you fight stronger pokemon so fighting higher leveled pokemon will reward more experience points. Also holding the item Lucky Egg will reward the pokemon with more experience points. A traded pokemon will also get more experience points. A traded pokemon holding a Lucky Egg will be rewarded with even more experience points. Also pokemon with more HP will tend to reward more points such as Chansey.
it's a bit hard to get pokemon up to level 100 if you can't cheat nor leveling up. wifi events pokemon are usually lvl. 100
by leveling up to level 78
on 139 is Omastar, gotten by leveling up Omanyte to level 40
it evolves with a fire stone not by leveling up
Cubchoo evolves into Beartic by leveling up to level 37.
a easier way of leveling up is below! Pokemon level 1-30 find a level 50 Pokemon Pokemon level 31-100 find a level 100 Pokemon Pokemon level 101-200 fight a level 200 Pokemon Pokemon level 201-300 fight a level 300 Pokemon and so on... WARNING YOU MUST DO THIS ON VERY EASY!!
Aside from cheating and using rare candies, there aren't necessarily any "easier" ways of leveling up your pokemon.
it's a bit hard to get pokemon up to level 100 if you can't cheat nor leveling up. wifi events pokemon are usually lvl. 100
By leveling to to level 26.
by leveling up to level 78
level 24
you just have to keep leveling up your pokemon. Try different areas that fit your pokemon's level. Hoped this helped!!
on 139 is Omastar, gotten by leveling up Omanyte to level 40
With some exceptions, most Pokemon that evolve will evolve by level up.
There isn`t levels in pokemon, only on leveling up that is LV. 100
Simply don't train it at all. Training a Pokemon is what causes it to level up.
It evolves at level 40 so just keep leveling your lileep!