Marshtomp that are evolved into Swampert from 2:00 p.m. to 7:00 p.m. local time on that day will learn the Charged Attack Hydro Cannon. This move has 80 power in Trainer Battles and 90 power in Gyms and in raids.
The following event bonuses will also be active throughout the event:
- 3× Catch XP
- Incense activated during the event will last for three hours
- Lure Modules activated during the event will last for three hours
- Take a few snapshots during Community Day Classic for a surprise
- Sources
Community Day Classic: Memories of Mudkip – Pokémon GO
pokemongolive.com