Emolga served as the game's obligatory "Electric rodent Pokemon" a role Emolga played alone, since Black and White did not include Pikachu. Emolga was also one of two Pokemon used by the Electric type gym leader Elesa along with Zebstrika.
Pokemon GO Emolga: How to Catch
Emolga is fairly rare but can currently be found in the wild with slightly increased spawns due to the Unova Week event. Emolga will also be hatching from seven kilometre event eggs. Currently egg hatch distance has been halved in the game so hatching eggs might be the easiest method, especially if you're doing a lot of walking anyway. Aside from that all can really do is rely on luck of the draw.