Features

Bellsprout will be available in the wild.  Bellsprout's shiny variant has already been released.
Evolving Weepinbell into Victrebel will learn the exclusive Fast Attack, Magical Leaf (Grass).  Evolve until 10pm to gain the move.

Bonuses

3x Catch Stardust
3-hour Incense (Excludes Daily Incense)
3-hour Lures (Excludes Golden Lures)
2x Catch Candy
2x Chance to receive XL Candy from catching Pokémon (Level 31+)
5x Photobomb by Litten

Wild Spawns

Raids

Starting at 5pm, Weepinbell will appear in Level 4 Raids.  Once you defeat the raid, Bellsprout will appear within 300-meters of the gym that hosted the raid.  Shiny rates will be the same as for community day.  These raids will continue until 10pm. These raids can NOT be accessed with a Remote Raid Pass.

Research

Event-exclusive Special Research Story

For $1.00 (USD) (or the equivalent pricing tier in your local currency), you’ll be able to access the Bellsprout Community Day–exclusive Special Research.

Shiny

Litten will have an increased chance of being shiny and this will mark its first appearance in Pokémon Go.

Graphics