You can't
You can trade even if you don't have badges, but Pokemon may disobey you. 0 badges = up to level 10 2 badges = up to level 30 4 badges = up to level 50 6 badges = up to level 70 8 badges = any level.
There is no restriction of level for the Elite Four. The only thing you need is all 8 badges. However, try to have all your Pokemon about Level 50.
2 badges - up to level 30 4 badges - up to level 50 6 badges - up to level 70 8 badges - any level will obey you
These are the Gym Badges that make your Pokemon obey:Knuckle Badge: Pokemon up to level 30 obey you.Heat Badge: Pokemon up to level 50 obey you.Feather Badge: Pokemon up to level 70 obey you.Rain Badge: All Pokemon regardless of their level will obey you.
It is because you do not have the correct gym badge. The gym badges typically allow you to control higher level Pokemon, a symbol of you mastery, if you will, and without this symbol, some Pokemon will not see a need to obey you.
If you do not have any Gym Badges, you will need to get a Pokemon at level 10 or lower to obey. If you get a high level Pokemon from someone, they would never listen until you get the right amount Gym Badges for that Pokemon's level.
Badges allow Pokemon obey to a certain level. Once you get all badges, any traded Pokemon will obey at any level.
Level 100.
Lairon evolves at level 42-45 in Pokemon Emerald version.
After you get six badges.
Poochyena is a dark type of Pokemon. In Pokemon Emerald it will evolve if you raise it up to level 18.
Snorunt evolves at Level 42 in "Emerald."