The Owsla are select groups of patroller and fighter Nidoran that roam the Kanjoh colonies (Route 9, Viridian and Goldenrod) offering protection. The term is drawn directly from the patroller groups in Watership Down.
Owsla forces are usually comprised of Nidorino (and Nidorina?) of various ages who roam their colonies's outskirts, shadowing Trainers and keeping kits under check (thus, they are not normally seen in the routes). The process by which one becomes an Owsla and the responsibilities associated with it change from colony to colony.
Known members of various Owsla patrols include Maekrite.