1. Give it exp. share.
2. Kill Pokemon.
3. When battling, switch pokemon and defeat it.
Poochyena is a dark type of Pokemon. In Pokemon Emerald it will evolve if you raise it up to level 18.
you train them
You level a Pokemon up.
The easiest way to level up is to feed Pokemon Rare candies.
Victory road
Well you can't catch level 100 wild Pokemon in emerald, so get up and start training if you want a level 100
To get a Pokemon level up quickly is to have a Pokemon hold exp. Share and then just battle a bunch of trainers or wild Pokemon.
in elite 4.
Level 100.
train some electric Pokemon or just level up your Pokemon loads
There really isn't much you can do with it. You can level up some other mon to lvl100
Lairon evolves at level 42-45 in Pokemon Emerald version.