Acromi is a purple barn owl - like monster that isn't normally good at battling due to its poor stats. In turn, its growth stat helps it level up quicker than normal pets.
Acromies can only be found in trainer battle or evolving your own Browl.
Acromi evolves from Browl at level 12, and doesn't evolve into anything. It is the second evolution to Browl and is the last evolution.
"The eyes of an Acromi are so big and bright, that they are often mistaken for stars in the night."