In the popular game Pokemon Go, the fully evolved forms of Galarian starters will soon gain their Gigantamax transformations, starting with the Grass-type starter Rillaboom. Here’s a breakdown of everything you need for adding this new addition to your Pokedex.
Ever since the Max Out Season began, it has been introducing Dynamax and Gigantamax Pokemon to Niantic’s game approximately every two months, with these colossal creatures making regular appearances.
To delight players across the globe, the Galarian starters – Rillaboom, Cinderace, and Inteleon – will obtain their Gigantamax forms during the Go Fest 2025 in-person activities, which also include unique, worldwide free-to-play events.
First up at Serene Retreat is the Gigantamax Rillaboom! Learn how to defeat it and make an attempt to capture it afterwards!
Gigantamax Rillaboom weaknesses in Pokemon Go
With its pure Grass type, Gigantamax Rillaboom is vulnerable to Bug, Fire, Flying, Ice, and Poison-based attacks. Fortunately, a variety of D-Max and G-Max creatures in the game possess these types, making it simple for players to create their optimal team setup.
Regardless, it’s important to mention that they ought to steer clear of employing any Pokemon equipped with Electric, Grass, Ground, or Water-based attacks, because these types won’t inflict substantial harm on their target.
Remember that only fellow Gigantamax or Dynamax Pokemon are eligible in Max Battles.
Gigantamax Rillaboom best counters
Despite being relatively fresh additions to the game, there’s a wealth of effective options to choose from when attempting to defeat G-Max Rillaboom.
A more straightforward way of putting it would be: The top picks are Gigantamax Charizard and Dynamax Moltres because they can exploit the fire and flying vulnerabilities of a Gigantamax Rillaboom.
If any of those aren’t available, you can opt for their alternative versions (such as G-Max Charizard’s) or select another Pokemon from the list. Keep in mind that generally, Gigantamax forms are stronger, inflicting significantly more damage than their Dynamax equivalents.
How to get Gigantamax Rillaboom in Pokemon Go
During the Serene Retreat event, which takes place from Friday, May 30, 2025, at 10:00 AM to Tuesday, June 3, 2025, at 8:00 PM local time, Gigantamax Rillaboom will make its appearance. This global, free-to-play event coincides with the in-person Go Fest 2025 Osaka event, happening simultaneously around the world.
Back then, I found myself squaring off against the formidable 6-Star Max Battle boss, G-Max Rillaboom, multiple times over. It was quite the challenge!
Just a heads-up: Starting from May 13, players have the option to participate in Max Battles from their own locations. They can do this by utilizing Remote Raid Passes, which allow them to join battles at Power Spots from afar.
In order to engage in a Gigantamax battle, players need to spend 800 Max Particles. These particles can be obtained by visiting Power Spots on a daily basis. If you’re unable to beat the Max Battle boss, the Max Particles will automatically be returned to you, allowing you another chance.
It’s important to mention that these unique beings can’t be captured in their colossal forms. As a result, after overcoming the Gigantamax Rillaboom, trainers will get an opportunity to attempt catching a standard Rillaboom with the Gigantamax capability.
How to evolve Rillaboom into Gigantamax Rillaboom
As a gamer, I’ve noticed that when a Pokemon Gigantamaxes, it becomes a more powerful version of itself. However, it’s important to understand that this isn’t an evolution in the traditional sense. Instead, it’s a temporary transformation that only occurs during battles.
This implies that players cannot transform Rillaboom into Gigantamax Rillaboom through evolution. However, they can battle and capture a standard Rillaboom with the Gigantamax trait instead. When utilized in a Max Battle, it will assume its colossal form for the duration of the encounter.
Gigantamax Rillaboom CP in Pokemon Go
Just like other Raid Bosses in the game, capturing Gigantamax Rillaboom following its defeat in a Max Battle will result in changes to its CP. Additionally, specific weather conditions can boost its CP.
| Max Battle Raid boss CP | TBD |
| CP range once captured | 1817 – 1899 |
| Gigantamax Rillaboom max CP (Level 50) | 3758 |
Gigantamax Rillaboom stats & moves
As a pure Grass-type Pokemon, Gigantamax Rillaboom has the following stats:
| ATTACK | DEFENSE | STAMINA | CP |
|---|---|---|---|
| 239 | 168 | 225 | 3758 |
Fast Moves
- Razor Leaf (Grass/STAB)
- Scratch (Normal)
Charged Moves
- Grass Knot (Grass/STAB)
- Energy Ball (Grass/STAB)
- Earth Power (Ground)
- G-Max Drum Solo (Grass/STAB)
Can Gigantamax Rillaboom be Shiny?
No, Gigantamax Rillaboom cannot be Shiny in Pokemon Go, as of yet.
Generally speaking, the Shiny form of a Pokémon like Rillaboom’s base stage, Grookey, usually appears a year after the regular version. Given that Grookey was introduced in September 2024, fans might need to wait until the latter half of 2025 before they can potentially unlock its Shiny version.
When activated, both Shiny Rillaboom and the subsequent Shiny Gigantamax Rillaboom will stand out more clearly due to a shift in their detailed grassy appearance from deep green to a vibrant lime green.
Just keep in mind that finding a Shiny Pokemon is quite rare, as there’s no particular technique for guaranteeing an encounter with one.
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2025-05-30 20:49