Gigantamax Rillaboom weaknesses are important to know before taking on the powerful six-star Max Battle during Gigantamax Rillaboom Max Battle Day in Pokémon GO. While Gigantamax Rillaboom is a pure Grass-type Pokémon, it boasts extremely high health and damage output, meaning you’ll need both the right counters and plenty of fellow Trainers to defeat it.
Whether you’re hunting for your first Gigantamax Pokémon or trying to catch the newly available Shiny Gigantamax Rillaboom, here’s everything you need to know before the event begins.
Gigantamax Rillaboom Weaknesses
Gigantamax Rillaboom is a Grass-type Pokémon, giving it five common weaknesses.
| Gigantamax Rillaboom Weaknesses | Effectiveness |
|---|---|
| Fire | Super Effective |
| Flying | Super Effective |
| Ice | Super Effective |
| Bug | Super Effective |
| Poison | Super Effective |
Fire-type attacks are expected to be the most reliable option thanks to the strength of several Dynamax and Gigantamax Fire Pokémon currently available.
Gigantamax Rillaboom Resistances
While building your team, it’s also useful to avoid attacks that Gigantamax Rillaboom resists.
| Type | Damage |
|---|---|
| Grass | Not Very Effective |
| Electric | Not Very Effective |
| Ground | Not Very Effective |
| Water | Not Very Effective |
Using these attack types will significantly reduce your overall damage during the battle.
Best Gigantamax Rillaboom Counters
Damage taken when Rillaboom is hit by each type: Weak to Resists Based on Grass typing. Abilities may modify these matchups.
Niantic hasn’t imposed any special battle restrictions, so Trainers should focus on bringing their strongest Fire-type Dynamax or Gigantamax Pokémon wherever possible.
Some of the strongest options include:
| Pokémon | Why It’s Strong |
|---|---|
| Gigantamax Charizard | Powerful Fire-type Max Moves and high damage output. |
| Dynamax Charizard | Excellent Fire attacker with strong survivability. |
| Gigantamax Cinderace | High Fire damage and powerful Max attacks. |
| Dynamax Cinderace | Strong offensive Fire option. |
| Gigantamax Centiskorch | Fire typing helps exploit Rillaboom’s biggest weakness. |
If you don’t have these Pokémon available, Flying-, Ice-, Bug-, or Poison-type attackers can also perform well, provided they’re properly levelled.
Can You Beat Gigantamax Rillaboom Solo?
No. Like previous six-star Gigantamax Max Battles, Gigantamax Rillaboom is designed as a multiplayer challenge.
Even with powerful Dynamax Pokémon, most Trainers will need to work together to defeat it successfully. Coordinating with local communities or Community Ambassador meetups will give you the best chance of earning a victory before the event ends.
Gigantamax Rillaboom Max Battle Day
Weak to
Resists
Based on Grass typing. Abilities may modify these matchups.
Overgrow
Strengthens Grass moves to inflict 1.5× damage at 1/3 max HP or less.
Grassy Surge Hidden
When this Pokémon enters battle, it changes the terrain to Grassy Terrain.
Gigantamax Rillaboom will appear during Gigantamax Rillaboom Max Battle Day on Saturday, August 1, 2026, from 2:00 p.m. until 5:00 p.m. local time.
During the event Trainers can also benefit from:
| Bonus | Available |
|---|---|
| 1,600 Max Particle storage | ✔ |
| 8× Max Particles from Power Spots | ✔ |
| Extra Power Spots | ✔ |
| Three Special Trades | ✔ |
| Increased Remote Raid limit | ✔ |
| First Shiny Gigantamax Rillaboom | ✔ |
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How to Prepare for Gigantamax Rillaboom
Preparing ahead of the event can make a significant difference. Power up your strongest Fire-type Dynamax or Gigantamax Pokémon before August 1, stockpile Max Particles in advance, and make sure you have enough healing items available after each battle. Since Gigantamax Rillaboom will only be available for three hours, organising a route between nearby Power Spots with friends or your local Pokémon GO community can help maximise the number of battles you complete.
Gigantamax Rillaboom Weaknesses
Knowing the Gigantamax Rillaboom weaknesses before Max Battle Day gives Trainers the best chance of defeating one of Pokémon GO’s toughest Grass-type encounters. Bringing powerful Fire-type attackers, teaming up with other Trainers and taking advantage of the event bonuses will all help you defeat Gigantamax Rillaboom and, if you’re lucky, encounter its newly released shiny form.
