https://www.gamespot.com/articles/pokemon-go-valentines-day-event-happening-now-for-/1100-6456760/

Valentine's Day is upon us, and a lot of video games are celebrating the holiday by holding special Valentine's Day-themed events for a limited time. That includes Pokemon Go, which has now kicked off its own Valentine's event, giving players a chance to capture some very rare pink Pokemon and earn extra bonuses.

From now until February 15, Pokemon Go players will encounter increased spawns of the heart-shaped Pokemon Luvdisc, one of the many Gen 3 Pokemon that were recently added to Pokemon Go. Chansey will also appear more frequently for the duration of the event. Players will be rewarded with triple the usual amount of Stardust for each Luvdisc and Chansey that they catch.