[SET]
name: Choice Attacker
move 1: Grassy Glide
move 2: U-turn
move 3: Knock Off
move 4: High Horsepower / Wood Hammer / Superpower
item: Choice Band
ability: Grassy Surge
ability: Adamant / Jolly
evs: 252 HP / 252 Atk / 4 Spe
[SET COMMENTS]
* Choice Band makes Rillaboom a very powerful offensive presence, and a great way to revenge kill weakened Pokemon thanks to Grassy Glide's priority under Grassy Terrain.
* U-turn makes Rillaboom a fantastic piviot, and can maintain momentum against common checks such as Toxapex and Corviknight.
* Knock Off not only has utility in destroying items, but also hits several important foes that Grass-type coverage doesn't hit, such as Cinderace and Dragapult.
* High Horsepower is Rillaboom's most powerful attack against Magnezone and Dracozolt, and 2HKOs Toxapex switch-ins as well.
* Wood Hammer may have redundent coverage, but it has an astounding amount of power compared to Grassy Glide, with even bulky foes like Toxapex and Porygon2 taking over 50%, and 2x resistances still taking a massive amount of damage.
* Superpower is Rillaboom's most powerful attack against Ferrothorn, though the Attack and Defense drop can be troublesome.
* Rillaboom should always use its Gigantamax forme, since this will turn any Grass-type attack into a powerful 160 BP STAB that ignores Disguise. Since Grassy Surge already sets up Grassy Terrain, Dynamax Rillaboom is fairly useless in comparison.
* An Adamant nature and maximum HP give Rillaboom a good amount of bulk, but consider Jolly and maximum Speed for outspeeding Gyarados, and speed tying with opposing Rillaboom at worst.
[SET]
name: Offensive
move 1: Grassy Glide
move 2: Knock Off
move 3: Swords Dance / Drum Beating
move 4: High Horsepower / Drain Punch / U-turn / Acrobatics
item: Grassy Seed / Focus Sash / Miracle Seed
ability: Grassy Surge
nature: Jolly / Adamant
evs: 4 HP / 252 Atk / 252 Spe
[SET COMMENTS]
* Grassy Glide's priority under Grassy Terrain makes it a requirement on Rillaboom.
* Knock Off hits several foes that Grassy Glide doesn't cover, such as Dragapult and Cinderace, in additon to removing opposing items.
* Swords Dance lets Rillaboom become a potent late-game cleaner.
* Drum Beating may not provide additonal coverage, but the Speed drop it provides is great for general support, and punishing frailer switch-ins such as Cinderace and Volcarona.
* High Horsepower is Rillaboom's best move against Magnezone and Dracozolt, and it also provides a very useful Special Defense boost when Gigantamaxed.
* U-turn makes Rillaboom a fantastic pivot, and does a wonderful job of gaining momentum against defensive checks like Corviknight.
* Acrobatics allows Rillaboom to get the valuable Max Airstream while Gigantamaxed, and is a powerful tool against opposing Rillaboom when used with Grassy Seed.
* Rillaboom's Gigantamax forme should always be used, since the powerful 160 BP STAB and ignoring Disguise are far too valuable to give up. Grassy Surge already sets up Grassy Terrain, making Rillaboom's regular forme useless.
* Grassy Seed gives Rillaboom a one-time Defense boost, which is extremely useful for setting up Swords Dance.
* Despite Rillaboom's bulk, Focus Sash letting Rillaboom survive one powerful attack can change the flow of the game.
* Miracle Seed gives Rillaboom a useful boost for its Grass-type attacks, without the bulk-reducing consequences of Life Orb.
EV Spreads
========
* With maximum Speed and Jolly, Rillaboom speedties with opposing Rillaboom at worse, and outspeeds important foes such as Gyarados and neutral nature Rotom-A. This also allows Rillaboom to outspeed Inflitrator Dragapult if it's been hit with Drum Beating or Max Airstream.
* If more bulk is needed, Rillaboom has a wide variety of Speed benchmarks to consider. 28 Speed EVs is the minimum amount needed with an Adamant nature to outspeed Jolly Mimikyu.
* 52 Speed EVs with an Adamant nature is required to outspeed Volcarona and Charizard after a Speed drop from Drum Beating.
* To outspeed Cinderace after a Drum Beating Speed drop or Max Airstream, 164 Speed EVs with an Adamant nature, or 76 Speed EVs with a Jolly nature are required.
Team Options
============
Rillaboom best two defensive checks are Corviknight and Skarmory, so those two should always be prepared for. Flying-types and Fire-types in general are also problematic checks for Rillaboom that needed to be addressed.
* Corviknight and Skarmory checks:
* Flying-type checks: 
(Choice Scarf)
* Fire-type checks:
name: Choice Attacker
move 1: Grassy Glide
move 2: U-turn
move 3: Knock Off
move 4: High Horsepower / Wood Hammer / Superpower
item: Choice Band
ability: Grassy Surge
ability: Adamant / Jolly
evs: 252 HP / 252 Atk / 4 Spe
[SET COMMENTS]
* Choice Band makes Rillaboom a very powerful offensive presence, and a great way to revenge kill weakened Pokemon thanks to Grassy Glide's priority under Grassy Terrain.
* U-turn makes Rillaboom a fantastic piviot, and can maintain momentum against common checks such as Toxapex and Corviknight.
* Knock Off not only has utility in destroying items, but also hits several important foes that Grass-type coverage doesn't hit, such as Cinderace and Dragapult.
* High Horsepower is Rillaboom's most powerful attack against Magnezone and Dracozolt, and 2HKOs Toxapex switch-ins as well.
* Wood Hammer may have redundent coverage, but it has an astounding amount of power compared to Grassy Glide, with even bulky foes like Toxapex and Porygon2 taking over 50%, and 2x resistances still taking a massive amount of damage.
* Superpower is Rillaboom's most powerful attack against Ferrothorn, though the Attack and Defense drop can be troublesome.
* Rillaboom should always use its Gigantamax forme, since this will turn any Grass-type attack into a powerful 160 BP STAB that ignores Disguise. Since Grassy Surge already sets up Grassy Terrain, Dynamax Rillaboom is fairly useless in comparison.
* An Adamant nature and maximum HP give Rillaboom a good amount of bulk, but consider Jolly and maximum Speed for outspeeding Gyarados, and speed tying with opposing Rillaboom at worst.
[SET]
name: Offensive
move 1: Grassy Glide
move 2: Knock Off
move 3: Swords Dance / Drum Beating
move 4: High Horsepower / Drain Punch / U-turn / Acrobatics
item: Grassy Seed / Focus Sash / Miracle Seed
ability: Grassy Surge
nature: Jolly / Adamant
evs: 4 HP / 252 Atk / 252 Spe
[SET COMMENTS]
* Grassy Glide's priority under Grassy Terrain makes it a requirement on Rillaboom.
* Knock Off hits several foes that Grassy Glide doesn't cover, such as Dragapult and Cinderace, in additon to removing opposing items.
* Swords Dance lets Rillaboom become a potent late-game cleaner.
* Drum Beating may not provide additonal coverage, but the Speed drop it provides is great for general support, and punishing frailer switch-ins such as Cinderace and Volcarona.
* High Horsepower is Rillaboom's best move against Magnezone and Dracozolt, and it also provides a very useful Special Defense boost when Gigantamaxed.
* U-turn makes Rillaboom a fantastic pivot, and does a wonderful job of gaining momentum against defensive checks like Corviknight.
* Acrobatics allows Rillaboom to get the valuable Max Airstream while Gigantamaxed, and is a powerful tool against opposing Rillaboom when used with Grassy Seed.
* Rillaboom's Gigantamax forme should always be used, since the powerful 160 BP STAB and ignoring Disguise are far too valuable to give up. Grassy Surge already sets up Grassy Terrain, making Rillaboom's regular forme useless.
* Grassy Seed gives Rillaboom a one-time Defense boost, which is extremely useful for setting up Swords Dance.
* Despite Rillaboom's bulk, Focus Sash letting Rillaboom survive one powerful attack can change the flow of the game.
* Miracle Seed gives Rillaboom a useful boost for its Grass-type attacks, without the bulk-reducing consequences of Life Orb.
EV Spreads
========
* With maximum Speed and Jolly, Rillaboom speedties with opposing Rillaboom at worse, and outspeeds important foes such as Gyarados and neutral nature Rotom-A. This also allows Rillaboom to outspeed Inflitrator Dragapult if it's been hit with Drum Beating or Max Airstream.
* If more bulk is needed, Rillaboom has a wide variety of Speed benchmarks to consider. 28 Speed EVs is the minimum amount needed with an Adamant nature to outspeed Jolly Mimikyu.
* 52 Speed EVs with an Adamant nature is required to outspeed Volcarona and Charizard after a Speed drop from Drum Beating.
* To outspeed Cinderace after a Drum Beating Speed drop or Max Airstream, 164 Speed EVs with an Adamant nature, or 76 Speed EVs with a Jolly nature are required.
Team Options
============
Rillaboom best two defensive checks are Corviknight and Skarmory, so those two should always be prepared for. Flying-types and Fire-types in general are also problematic checks for Rillaboom that needed to be addressed.
* Corviknight and Skarmory checks:
* Flying-type checks:
(Choice Scarf)* Fire-type checks:
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