Pokémon GO Grubbin Community Day (September 2023)

Trainers! September 2023 Community Day will feature Grubbin, the Larva Pokémon! On September 23, 2023, from 2pm to 5pm local time Grubbin will appear more frequently in the wild, and lucky trainers may encounter a shiny Grubbin! Additionally, Charjabug evolved during the event will know the Fast Attack Volt Switch Electric

If you are interested in learning more about Charjabug and Vikavolt, we recommend reading ⚡ A PvP Analysis on Community Day Charjabug (Vikavolt who?)  and Vikavolt as a Bug and Electric-type Raid Attacker: Better than you might think! ⚡⚔️.

Grubbin Community Day Overview

Event icon September 23, 2023, 2:00 p.m. - 5:00 p.m. local time
Pokemon Encounter icon Grubbin will appear more frequently in the wild.
XP icon 3x XP for catching Pokémon
Candy icon 2× Candy for catching Pokémon.
Candy XL icon 2× chance for Trainers level 31 and up to receive Candy XL from catching Pokémon.
Lure icon Lure Modules activated during the event will last for three hours.
Incense icon Incense (excluding Daily Adventure Incense) activated during the event will last for three hours.
Photobomb icon Take a few snapshots during Community Day for a surprise!
Trade icon Trades made during the event will require 50% less Stardust.*
Trade icon One additional Special Trade can be made for a maximum of three for the day*

*While most bonuses are only active during the three-hour event period, these bonuses will be active from 2:00 p.m. to 10:00 p.m. local time.

Featured Pokémon


Grubbin will appear more frequently in the wild. If you’re lucky, you may find a Shiny one! Grubbin is a Bug type Pokémon with a max CP of 1112, 115 ATK, 85 DEF and 132 STA. Grubbin is boosted by Rainy weather.

Evolving Grubbin

Grubbin evolves into Charjabug, and then into Vikavolt. 125 Candy is needed in total.

Pokémon Condition Evolution
Grubbin 25 Candy Charjabug
Charjabug 100 Candy
Magnetic Lure Module

Shiny Grubbin, Charjabug and Vikavolt

Grubbin Charjabug Vikavolt

Grubbin IV CP Chart

Grubbin Perfect IV CP Chart
1 13 2 43 3 73 4 103
5 132 6 162 7 192 8 221
9 251 10 281 11 309 12 337
13 365 14 393 15 421 16 450
17 478 18 506 19 534 20 562
21 590 22 618 23 646 24 675
25 703 26 731 27 759 28 787
29 815 30 843 31 857 32 871
33 886 34 900 35 914 36 928
37 942 38 956 39 970 40 984
41 996 42 1009 43 1022 44 1034
45 1047 46 1060 47 1073 48 1086
49 1099 50 1112

Vikavolt Exclusive Attack: Volt Switch

grubbin community day evolution vikavolt in the anime

Vivavolt can earn a new exclusive move during this event – Volt Switch. Keep an eye out for our PVP analysis.


Charjabug evolved during the event, or up to five hours afterward to get a Vikavolt that knows the Fast Attack Volt Switch.

  • Trainer Battles: 12 power
  • Gyms and raids: 14 power

Four-Star Raids


Charjabug will appear in four-star raids! After the three-hour Community Day event ends, Trainers will be able to take on unique four-star Raid Battles. Claiming victory in one of these raids will cause more Grubbin to appear around the Gym that hosted the raid for 30 minutes! Defeat Charjabug using our special tier 4 raid guide coming soon.

Event icon September 23, 2023, 5:00 p.m. - 10:00 p.m. local time
Raid icon You can only join these raids using Raid Passes and Premium Battle Passes. Remote Raid Passes cannot be used to join these Raid Battles.

Bonus for completing four-star Raid Battles

Once you successfully complete a four-star Raid Battle against Charjabug, Grubbin will appear around the Gym that hosted the raid for 30 minutes. If you’re lucky, you may encounter a Shiny one (*)!

*Grubbin that appear under these circumstances will have the same chance of appearing as a Shiny Pokémon as those that appear during September’s Community Day’s three-hour event period.

Timed Research

Community Day Special Research story – Plugging Along

Grubbin Community Day Research

  • For US$1.00 (or the equivalent pricing tier in your local currency), you’ll be able to access the Grubbin Community Day–exclusive Special Research story, Plugging Along.
  • Stay tuned for when tickets for the Special Research story go live.
  • Don’t forget: you’re now able to purchase and gift tickets to any of your friends that you’ve achieved a Friendship level of Great Friends or higher with.* To gift a ticket, tap the Special Research ticket in the in-game shop, then tap the Gift button instead of the Buy button.

Additional Bonuses

Field Research

September Community Day-themed Field Research will be available! Catch Grubbin to earn rewards such as additional Grubbin encounters, Stardust, Ultra Balls, and more!


You’ll be able to get event-themed stickers by spinning PokéStops, opening Gifts, and purchasing them from the in-game shop. 

Tips and Tricks

Item recommendations

Grubbin Community Day is an old-school, grind-friendly, type of event, that features 3x Stardust and 2x Candy from catching Pokémon. Your most important item is a Star Piece. Also stock up with Pinap Berries to collect more Grubbin candy along the way, be sure to have Star Piece and Lucky Egg on for the entire duration, and make the most of this bonus.

  • Star Piece icon 6× Star Piece
  • Pinap Berry icon 100× Pinap Berry
  • Lucky Egg icon 6× Lucky Egg

Of course, Lure-up as many PokéStops as you can along your play route, and pop an Incense if you are experiencing spawn down time.

Beneficial Mega Evolutions

Try to get a Bug Mega Pokémon to at least high level, or even Max level to enjoy the bonuses that having that Pokémon mega evolved during the event can give you. Be sure to Mega Evolve for extra Candy from catches.

Evolve one of these for same type Mega bonuses:

Base Level

  • 1 Bonus Catch Candy

High Level

  • 1 Bonus Catch Candy *
  • 50 Bonus Catch XP * 
  • 10% Boost to XL Candy Chance *

Max Level

  • 2 Bonus Catch Candy *
  • 100 Bonus Catch XP *
  • 25% Boost to XL Candy Chance *

(*) Note: The catch candy and catch XP bonuses only apply to Pokémon caught of the same type as your mega-evolved Pokémon. 

Don’t catch Pokémon before the event starts

Pokémon you have not caught before the event start can turn into Grubbin, which means it is best to arrive at your spot early and wait to catch it until the event starts.

Restart the app before the event

Be patient – there will always be errors and bugs at the start of the event. It is best to restart the app in most, if not all, cases.

Don’t forget to spin PokéStops

Remember PokéStops give out quests that are very beneficial on Community Day, giving you rewards for Stardust, Great and Ultra Balls, and Pinap Berries, all things that can help you if your stocks are low.

Don’t activate lures before the event starts

To ensure that you have Lures up the entire duration, do not set your lures before the start of the event, as those will only last 30 minutes. The Lure has to go up after the event has started to last for three hours. Not to mention it will block the boosted CD spawns from spawning until it has depleted.

Use Incense

Use Incense to attract even more Pokémon to you while you’re out hunting. If you are wondering, yes, Incense can spawn Community Day ‘mons, that can be shiny. There is no reason why you should avoid Incense if you have it.

Don’t forget to enjoy the event

  • Chat with your fellow Trainers and grow your local Pokémon Go community. Make good use of the QR code feature to make some new friends!
  • Promote the new Pokémon Go features and events to Trainers who are just starting their adventure or haven’t been playing for a while. People are coming back around due to trading, new Pokémon, PvP, the numerous events, and these community-based events.
  • Most importantly, have fun, get some shinies, and hope for no game-breaking glitches!

Author & tags

My name is Niladri Sarkar. A Team Valor Trainer, I'm a Pokémon Battle Mechanics Specialist & a Dragon Master on Smogon's Pokémon Showdown where I particularly excel with Dragon types and Weather teams in Ubers / OU. I love to apply my vast knowledge and experience to the ever changing meta of Pokémon Go, specialising in DPS/TDO math, movesets, the Master League and Dragon types. Garchomp is my best Pokémon pal through and through.

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