Rillaboom - Moveset & Best Build for Ranked Battle | Grassy Surge Hidden Ability Moveset | Pokemon Sword and Shield

This is a strategy guide for using Rillaboom in competitive play for the games Pokemon Sword and Shield. Read on for tips on the best Nature, EV spreads, Movesets, Builds, and Held Items to use with Rillaboom, as well as its strengths and weak points.

Rillaboom - Related Articles
Evolution and Learnset	Build for Ranked Battle	Gigantamax Rillaboom

Basic Information for Rillaboom

Types and Abilities

Pokemon	Type 1	Type 2
Rillaboom
Abilities
Overgrow	Powers up Grass-type moves in a pinch.
Grassy Surge (Hidden)	The Pokemon creates a Grassy Terrain when it enters a battle.

Type Defenses

	Type
Takes 4x damage	-
Takes 2x damage
Takes 0.5x damage
Takes 1/4x damage	-
Takes 0x damage	-

What is Type Effectiveness?

Base Stats

Best Nature for Rillaboom

What are Natures?

How to Learn Rillaboom's Egg Moves

Moveset & Best Build for Rillaboom

Choice Item Moveset & Best Build

This set focuses on taking advantage of Rillaboom's high Defense and Speed, while escaping from difficult matchups with U-turn. Even if the opponents outspeeds Rillaboom, it can use Drum Beating to decrease its opponent's Speed and gain the upper hand.

With its Hidden Ability Grassy Surge, Rillaboom will automatically set up Grassy Terrain to power up all Grass-type moves to 1.3x power. This allows it to take out Wash Rotom with 252 EVs placed in HP with a single Drum Beating, and handle a variety of opponents that it could not have before with its newfound power boost.

Grassy Surge also ensures Rillaboom's Grassy Glide has increased priorty, allowing it to hit faster Water, Rock, and Ground-type Pokemon for super effective damage.

How to Get Grassy Surge Rillaboom

A free Grookey with the Grassy Surge Ability is available via Pokemon HOME. Learn how to get all three Galar Starters with Hidden Abilities and transfer them to Pokemon Sword and Shield with our guide below:
How to Get & Transfer Hidden Ability Starters from Pokemon HOME

Other Viable Moves

Assault Vest Moveset & Best Build

This build is a better for handling opponents like Primarina, Excadrill and Wash Rotom. These Pokemon rarely have an attack which can hit Rillaboom effectively, so use Drum Beating on whatever switches and Grassy Glide on Pokemon that can outspeed you.

Its EVs are placed here to allow it to outspeed a Mimikyu with its Speed decreased by one stage, so it can take the upper hand when Mimikyu comes out on a switch-in. When Mimikyu hasn't used Swords Dance yet, Rillaboom can handle its hits with no problem, and it can beat back to net a KO.

Other Viable Moves

How to Use Rillaboom Effectively

An attacker who combines Attack and Defense

Rillaboom is able to hit hard with its high Attack. It also has high Speed, so arming it with a Choice Scarf can allow it to take advantage of this to move faster and defeat many opponents.

Must watch out for its many weaknesses

As a Grass-type Pokemon, Rillaboom is cursed with weaknesses to Fire, Flying and others which are frequently held even by non-STAB opponents. Don't send it up against opponents who it can't handle.

Counters for Rillaboom

Take advantage of its weaknesses

As Rillaboom is a Grass-type Pokemon, a type with several weaknesses, and since it can only learn Moves of a few types, it's easy to exploit these weaknesses with an advantageously-typed Pokemon.

Best Pokemon to Use

Pokemon	Description
Heat Rotom	Ranking: ★★★★★ ・Can go for a knockout with Overheat ・Can handle almost all of Rillaboom's attacks with its type combination and Levitate
Corviknight	Ranking: ★★★★☆ ・A physical attacker with a great dual-typing of Flying and Steel ・Can take an attack even when switched in on Rillaboom Best Ranked Battle Build for Corviknight
Gyarados	Ranking: ★★★★☆ ・Can deal super effective damage while raising its Speed with Max Airstream Best Ranked Battle Build for Gyarados

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Movesets & Best Builds for Returning Pokemon
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Conkeldurr	Quagsire	Gastrodon
Lapras	Whimsicott	Rhyperior
Goodra	Haxorus	Glaceon
Mow Rotom	Type: Null	Gengar
Milotic	Gardevoir	Flygon
Chandelure	Lanturn	Torkoal
Bisharp	Seismitoad	Silvally
Butterfree	Primarina	Incineroar
Blastoise	Decidueye	Venusaur
Darmanitan	Alolan Ninetales	Gothitelle
Crawdaunt	Clefable	Reuniclus
Kommo-o	Terrakion	Cobalion
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