How to Beat Gigantamax Rillaboom in Pokémon GO: Best Counters and Battle Guide

Gigantamax Rillaboom is not the kind of Pokémon GO boss you can beat by filling the lobby with random counters and tapping until the battle ends. As a Tier 6 Max Battle boss, it has enough bulk and damage to punish groups that ignore team roles, Max Move upgrades, or basic coordination. Entering the battle costs 800 Max Particles, although those particles are only consumed after a successful win, and the Rillaboom you catch afterward will fall between 1,817 CP and 1,899 CP.

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The practical plan is simple: bring strong Fire-type damage, make sure at least one player is willing to tank, and keep a healer ready for the moments when the whole team starts dropping. You do not need three perfect level 50 counters, but you do need Pokémon that have actually been powered up and given useful Max Move upgrades. A well-built counter you already own will usually contribute more than a freshly caught “top-tier” option with no investment behind it.

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Gigantamax Rillaboom Weaknesses and Resistances

Rillaboom is a pure Grass-type Pokémon, so it is weak to Fire, Flying, Bug, Poison, and Ice attacks. Fire is the easiest weakness to build around because several strong Dynamax and Gigantamax Fire types are already available, including Cinderace, Charizard, Darmanitan, Moltres, Flareon, and Ho-Oh. Flying and Bug damage can also work well, especially when those Pokémon are already built and your Fire roster is still underdeveloped.

• Weak to: Fire, Flying, Bug, Poison, and Ice
• Resists: Grass, Water, Ground, and Electric

Do not automatically dismiss every resisted Fast Move, though. A defender may still use one if it attacks quickly and helps the group fill the Max Meter faster. Tanks and healers are not expected to top the damage chart; their job is to stay alive, create more Dynamax phases, and give the main attackers enough time to finish the battle.

Best Gigantamax Rillaboom Counters

Gigantamax Cinderace is the best overall attacker for this fight because G-Max Fireball delivers excellent super-effective damage during each Gigantamax phase. Gigantamax Charizard is the next-best choice and is often the more realistic option for players who have already invested in one. If your Charizard is fully powered up with an upgraded G-Max Move, there is no good reason to bench it for a low-level Darmanitan simply because the latter appears slightly higher in a generic Fire-type comparison.

For regular Dynamax Pokémon, the Fast Move determines the type of the Max Attack. Darmanitan needs Fire Fang or Incinerate if you want it to use Max Flare, while Moltres can choose Fire Spin for Max Flare or Wing Attack for Max Airstream. Gigantamax Pokémon work differently because they keep their signature G-Max attack regardless of Fast Move type, so Cinderace and Charizard can focus more on attack speed and meter generation.

What Should You Use Without the Top Counters?

Use the strongest Max-eligible Pokémon you have actually invested in. A powered-up Gigantamax Gengar or another strong off-meta option may contribute more than a freshly caught Darmanitan with no Max Attack upgrades and not enough bulk to survive. Type advantage matters, but it does not erase the value of Pokémon level, Max Move investment, and the ability to stay active through several battle phases.

For most accounts, the sensible priority is Gigantamax Cinderace first, followed by Gigantamax Charizard and then the strongest upgraded Dynamax Fire attacker already in your collection. After that, look at good Flying-, Bug-, Poison-, or Ice-type options before falling back on your best general Dynamax or Gigantamax Pokémon. Do not burn through all your Candy and Stardust just to copy a counter chart exactly.

Best Defenders for Gigantamax Rillaboom

This is where many public groups run into trouble. Four players using Max Attack every turn may look aggressive, but that plan often ends with the main damage dealers fainting before the next Dynamax phase. A good defender buys time, charges the meter through quick Fast Moves, and uses Max Guard to absorb the dangerous single-target attacks that would otherwise land on a more fragile attacker.

Dynamax Vespiquen is the standout tank because its Bug/Flying typing gives it excellent resistance to most of Rillaboom’s Grass attacks. It can remain active for a long time while using fast moves to push the group toward another Dynamax phase. Its personal damage is not the reason to bring it; the value comes from surviving, maintaining shields, and keeping the rest of the team out of danger.

Dynamax Corviknight is another excellent defender. Sand Attack is resisted by Rillaboom, but that is not a major problem because the move is mainly there to generate meter quickly rather than deal meaningful damage. The only real concern is the investment cost, since Corviknight also has a Gigantamax form and some players may prefer to save their Candy instead of heavily upgrading the standard Dynamax version.

Dynamax Butterfree is a reasonable budget alternative when the premium tanks are unavailable. It may look out of place next to Corviknight or Registeel, but its typing gives it strong Grass resistance and lets it perform the basic tank role. It is not especially bulky, so Max Guard needs to be managed more carefully and you should not expect it to survive repeated focused hits without support.

Best Healers for Gigantamax Rillaboom

Dynamax Blissey is the safest healer for this battle. Its huge HP pool gives it enough time to build the Max Meter and support the team with Max Spirit, even when the fight lasts several cycles. Wailord, Snorlax, and Gigantamax Lapras are the strongest alternatives, while Vaporeon can still fill the role but needs more protection because it is weak to Grass damage.

• Dynamax Blissey
• Dynamax Wailord
• Dynamax Snorlax
• Gigantamax Lapras
• Dynamax Vaporeon
• Eternatus

A healer does not need to deal impressive damage. Its real contribution is keeping Cinderace, Charizard, and the other attackers alive long enough to reach another burst window. When two or three teammates are low on health, one well-timed Max Spirit will usually add more total damage to the battle than another weak Max Attack from the support slot.

Best Team Setup for Gigantamax Rillaboom

Up to 40 Trainers can enter a Gigantamax Battle, but those players are divided into smaller teams of four during the fight. Each group should have a rough plan before the battle starts, especially when the lobby is not filled with fully upgraded counters. The most reliable setup uses two attackers, one defender, and one healer, giving the group enough damage to make progress without giving up the shielding and recovery needed to survive.

A strong four-player group could use Gigantamax Cinderace and Gigantamax Charizard as the two attackers, Dynamax Vespiquen or Corviknight as the defender, and Dynamax Blissey as the healer. The attackers should prioritize Max Attack upgrades, while the tank invests in Max Guard and the support player improves Max Spirit. A very strong lobby can play more aggressively, but most public groups will be more consistent when every role is covered.

How Many Trainers Are Needed?

The practical recommendation is around 10 to 40 Trainers, although the exact number depends heavily on counter quality and coordination. A smaller group can win when everyone brings high-level Pokémon, upgraded Max Moves, correct Fast Moves, and a clear role. A random public lobby filled with underleveled Pokémon may need many more players, even when the type matchups look good on paper.

You do not need a perfect roster, but every Trainer should contribute something useful. Bring at least one properly levelled attacker, defender, or healer and make sure its main Max Move has been unlocked or upgraded. An untouched Dynamax Wooloo will not automatically ruin a large lobby, but if half the group arrives expecting to be carried, the battle can still fail.

Gigantamax Rillaboom Movepool

Rillaboom mainly uses Grass-type attacks, with Normal- and Ground-type coverage mixed in. That is why defenders such as Vespiquen, Corviknight, Charizard, and Venusaur perform so well in most versions of the fight. The main coverage move to watch is Earth Power, which can punish Pokémon that comfortably resist its usual Grass damage.

Gigantamax bosses use two attacks from their available movepool. One move damages every active Pokémon and cannot be dodged, while the other targets a single Pokémon, deals much more damage, and can be avoided. When warning lines appear above your Pokémon, swipe left or right; dodging that focused hit can preserve your defender’s shields and reduce the amount of healing needed during the next Max phase.

How to Play the Battle

The best rotation is not complicated. Begin with a bulky defender or a quick charger, spam Fast Moves to fill the Max Meter, and collect any Max energy icons that appear during the battle. When the meter is nearly full, switch to the Pokémon that matches your assigned role so the attacker, defender, or healer is ready when the Dynamax phase begins.

• Lead with a defender or quick charger.
• Use Fast Moves to fill the Max Meter.
• Collect Max energy icons whenever they appear.
• Dodge focused attacks when the warning appears.
• Switch to your attacker before the Dynamax phase if needed.
• Use Max Attack, Max Guard, or Max Spirit according to your role.
• Return to the tank or charger when the Dynamax phase ends.

Each player receives three actions during a Dynamax phase, but that does not mean every action should automatically be spent on damage. The defender may need to refresh its shields, and the healer may need to recover the group before the attackers continue. A support action that prevents two Pokémon from fainting is usually more valuable than squeezing in one more weak attack.

Should You Use Charged Attacks?

Fast Move spam is generally more useful because it helps the group reach the next Dynamax phase sooner. Charged Attacks still deal damage, but their longer animations can slow down meter generation, and the main burst in this fight comes from super-effective Max Attacks. This is especially important for defenders and healers, who gain more value by keeping the battle rhythm moving than by chasing small amounts of personal damage.

How to Use Max Guard and Max Spirit

Max Guard

Max Guard gives the user a shield and helps direct focused attacks toward the defender. The tank should keep enough shielding active to survive the next battle phase before spending spare actions on damage or other support. Try not to have several players use Max Guard at the same time unless the group has planned for it, since overlapping shields can waste actions that would have been better used on healing or attacking.

Max Spirit

Max Spirit restores health to all four active Pokémon in the group. A good healer reacts to the team’s current condition rather than following a rigid rotation: when everyone is healthy, there may be no need to heal, but when several attackers are close to fainting, Max Spirit becomes the best move available. This is one of the biggest differences between a coordinated Max Battle group and a random lobby, because good support keeps the damage dealers active instead of forcing them to rebuild their teams halfway through the fight.

Is It Worth Building New Counters?

You do not need three level 50 Pokémon to make a meaningful contribution. Start with the strongest Max-eligible options already on your account, give them the correct moves, and upgrade the Max Moves that directly support their role. A small team of properly built Pokémon is far more useful than a full box of counters that were only powered up halfway.

1. Make sure a regular Dynamax attacker has the correct Fast Move type.
2. Upgrade Max Attack on your main damage dealer.
3. Unlock or improve Max Guard on a durable defender.
4. Unlock or improve Max Spirit on a healer.
5. Power up the Pokémon itself as far as your resources allow.
6. Only then begin investing in secondary counters.

Cinderace, Charizard, Blissey, and strong Dynamax Fire types are relatively safe investments because they should remain useful in other Max Battles. Even so, do not empty your Candy and Stardust reserves simply to copy the top six counters exactly. Build around your account, your local group, and the roles that are still missing from your regular Max Battle team.

Can Gigantamax Rillaboom Be Shiny?

Shiny Gigantamax Rillaboom is not available in this battle. Grookey’s Shiny form has not yet been released in Pokémon GO, so there is no Shiny hunt attached to this encounter. That may change during a future event, but no release date has been confirmed; you can check the Pokémon GO August 2026 events guide for other upcoming activities and bonuses.

Is Gigantamax Rillaboom Worth Catching?

Yes. G-Max Drum Solo gives Rillaboom a clear role as a Grass-type Max Battle attacker, and it should be valuable against future Water-, Ground-, and Rock-type bosses. It is especially useful for players who do not already have a heavily invested Grass attacker, although earning one requires a large enough group and teammates who understand that shielding and healing matter just as much as damage.

• Strong Grass-type Gigantamax damage
• Useful coverage against several common weaknesses
• A clear offensive role in future Max Battles
• Good long-term value for accounts lacking Grass damage

If you are also deciding where to invest outside Max Battles, our best Grass-type Mega Evolution guide compares the strongest Mega options for regular raids. Gigantamax Rillaboom fills a different role, but it is still a worthwhile catch for players who regularly join difficult Max Battles.

Frequently Asked Questions

What Is the Best Counter for Gigantamax Rillaboom?

Gigantamax Cinderace is the best attacker because G-Max Fireball deals powerful super-effective Fire damage. Gigantamax Charizard is the strongest alternative, followed by Dynamax Darmanitan and Moltres. A fully upgraded second-choice counter is usually better than an unlevelled top option.

What Is the Best Defender Against Gigantamax Rillaboom?

Dynamax Vespiquen is the top defensive choice because it heavily resists Grass attacks and can build the Max Meter quickly. Corviknight is another excellent tank if you already have one prepared, while Charizard, Venusaur, Zamazenta, and Registeel can also fill the role.

Why Does the Fast Move Matter in a Max Battle?

A regular Dynamax Pokémon’s Fast Move determines its Max Attack type. Darmanitan therefore needs a Fire-type Fast Move to use Max Flare, while Moltres can choose between Fire and Flying Max damage. Gigantamax Pokémon use their signature G-Max Move instead, so their Fast Move type is less important.

Can Four Trainers Beat Gigantamax Rillaboom?

A highly optimized group may be able to win with very few players, but four average Trainers will struggle. Most groups should aim for at least 10 prepared players, and public lobbies with weaker counters may need considerably more. Team quality matters just as much as the raw number of people in the lobby.

What Should I Use Without the Top Counters?

Bring your strongest upgraded Dynamax or Gigantamax Pokémon. A fully built off-meta option is usually more helpful than a perfect counter with no levels, no Max Move upgrades, and not enough bulk to survive. Try to contribute through damage, Max Guard, Max Spirit, or fast meter generation rather than chasing rankings alone.