Gigantamax Rillaboom returned to Pokémon GO for a dedicated Max Battle Day on Saturday, August 1, 2026, from 2:00 p.m. to 5:00 p.m. local time — and for the first time since it was added to the game, trainers had a shot at a Shiny Gigantamax Rillaboom. If you missed the window or you’re reading this while raids are still live in your area, here’s everything that mattered.
Where to find it
During the event window, every Power Spot in range switched over to feature Gigantamax Rillaboom exclusively, so there was no need to hunt for a specific Gym — any active Power Spot worked. Power Spots function like Gyms for Max Battles, and having every single one flip to the same boss for three hours made this one of the easier Gigantamax bosses to organize a group around.
The shiny debut
Shiny Gigantamax Rillaboom had never been available in Pokémon GO before this event. The shiny form swaps Rillaboom’s normal green tones for a noticeably lighter, almost pastel shade of green — subtle compared to some shiny redesigns, but distinct enough to spot in your Pokémon list once caught. As with any shiny debut tied to a single three-hour window, catching one came down to raid volume: the more battles you completed, the more encounter chances you got.
Event bonuses
Niantic packed in several bonuses around the core Max Battle Day window:
- Up to 1,600 Max Particles obtainable, with 8× Max Particles awarded from Power Spots during the event
- Three Special Trades available for the day, useful for locking in a trade evolution or clearing out Lucky Trade candidates
- An increased daily Remote Raid limit — raised from 10 to 20 — running slightly wider than the core event, from July 31 at 5:00 p.m. to August 1 at 8:00 p.m. PDT
The expanded Remote Raid limit in particular made this a good day to clear out a backlog of raid passes if you’d been sitting on them, independent of whether Gigantamax Rillaboom itself was your priority.
Ticketed content
For trainers who purchased the optional event ticket (US$4.99 or your local equivalent), event-exclusive Timed Research was available on top of the free bonuses. As with most ticketed Niantic events, the ticket didn’t gate the raid battles themselves — anyone could challenge Gigantamax Rillaboom for free — it only unlocked the bonus research line and its rewards.
Best counters
Gigantamax Rillaboom is a pure Grass type, which keeps its counter list simple: Fire, Flying, Poison, Bug, and Ice-type attackers all hit it for extra damage. Strong picks include Mega Charizard Y, Mega Blaziken, Reshiram, and Ho-Oh for Fire coverage, or Mega Pidgeot and Rayquaza if you’d rather lean on Flying-type moves. Since Max Battles use the Dynamax/Gigantamax combat system rather than standard raid mechanics, bringing a full party of six rather than a single min-maxed attacker matters more than usual — spread your type coverage across the team instead of stacking six copies of the same counter.
Why Max Battles reward showing up as a group
Max Battles scale meaningfully with more trainers participating, and the Dynamax mechanic gives every participant access to Max Moves regardless of their own Pokémon’s individual strength — meaning a lower-level trainer can still contribute meaningfully to a Max Battle in a way that’s harder in a standard 5-star raid. If your local scene organizes at specific Power Spots, Max Battle Days like this one are typically the highest-turnout raid events of the month.
How this fits the rest of August
Gigantamax Rillaboom Max Battle Day kicked off a packed month that also includes the August raid boss rotation, Mega Starmie’s Super Mega Raid Day later in the month, and the ongoing Spotlight Hour schedule. Check our Event Calendar to see exactly how these line up if you’re planning which weekends to prioritize.
Should you power up a Gigantamax Rillaboom?
Gigantamax and Dynamax Pokémon can’t be used outside of Max Battles themselves, so there’s no PvP or standard-raid argument for investing Max Particles into one — the appeal here is purely completionist (the shiny, specifically) and the immediate bonuses from participating. If Grass-type Max Battle performance matters to your local group’s rotation, Rillaboom remains one of the stronger Grass options in the Max Battle roster, but there’s no urgency to overinvest Max Particles in a single copy.
Frequently asked questions
Do I need the paid ticket to battle Gigantamax Rillaboom? No. The ticket only unlocked the bonus Timed Research — the raids themselves, and the chance at a shiny, were free for everyone.
Can Gigantamax Rillaboom be used in Trainer Battles? No. Dynamax and Gigantamax Pokémon are restricted to Max Battles and can’t be brought into GO Battle League or standard raids.
What happens to unused Max Particles? They carry over and stay usable on future Dynamax and Gigantamax Pokémon, so particles earned during this event weren’t wasted even if you didn’t spend them all on Rillaboom specifically.
Quick reference
Event: Saturday, August 1, 2026, 2:00–5:00 p.m. local time. Boss: Gigantamax Rillaboom at every Power Spot, shiny-eligible for the first time. Counters: Fire, Flying, Poison, Bug, or Ice-type attackers. Bonus window: Remote Raid limit raised to 20 from July 31, 5:00 p.m. through August 1, 8:00 p.m. PDT.
Comments are closed for this article.