18
Poochyena is a dark type of Pokemon. In Pokemon Emerald it will evolve if you raise it up to level 18.
Poochyena evolves at level 18.
Level 18
Level 20.
At level 18
train it to level 18
Poochyena evolves into Mightyena at Level 18.
I believe level 18
You'll need to evolve Poochyena at level 18 to get it.
Poochyena will continue to try to evolve until you let it evolve, unless it holds an Everstone. It will evolve into Mightyena whenever you want it to, if you do not choose to let it evolve at level 18.
Poochyena evolves at level 18, unless you press b during the evolution, or it is holding an everstone.
There is no Pokemon called pooches, if you meant poochyena, then at LVL 18.