When i play pokemon from beginning, i always lvl up only my main pokemon and some other pokemon with xp-share. And then the problem is at the end when u only have 1 or 2 high lvl pokemon at the league. So i was wondering, how do u lvl up your pokemon team togeather so when u reach league u have all your pokemons like lvl 50. I dont really know how to so if someone can write a quick guide would be nice. Thanks.