Pokémon GO's April Community Day will feature Snivy, the Grass Snake Pokémon! On Sunday, April 11, 2021, from 11:00 a.m. to 5:00 p.m. local time, you'll see Snivy appearing more frequently in the wild. If you're lucky, you may even encounter a Shiny one! To help you on your way, any Incense activated during the event will last for three hours. You'll also earn three times the normal amount of Stardust for catching Pokémon.
If you evolve a Servine (the Evolution of Snivy) during the event or up to two hours after it concludes, you can get a Serperior that knows Frenzy Plant, an attack that Serperior can't ordinarily learn.
Tickets that unlock a Snivy Community Day–exclusive Special Research story, Snivy in the Sunshine, will be available through the in-game shop for US$1 (or the equivalent pricing tier in your local currency). There will also be a one-time-purchase Community Day Box available for 1,280 PokéCoins that contains 50 Ultra Balls, four Star Pieces, four Mossy Lure Modules, and an Elite Charged TM.
Good luck catching Snivy, Trainers!