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.
Arbok does not evolve
level it to level 30
Haunter at level 25
Croagunk will attempt to evolve starting at Level 37.
Poochyena evolves into mightyena at level 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 20.
Level 18
At level 18
18
train it to level 18
I believe level 18
Poochyena evolves into Mightyena at Level 18.
You'll need to evolve Poochyena at level 18 to get it.
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.