Head to head

Decidueye vs Rillaboom

Decidueye and Rillaboom have the same base stat total (530), Rillaboom is faster (base Speed 85 vs 70), and neither has a super-effective hit from its own types (Decidueye: 1× at best against Rillaboom; Rillaboom: ½× at best against Decidueye).

Grass-type starter finals from Galar and Alola.

Base stats side by side

Who has the edge?

Rillaboom is faster (85 vs 70 base Speed), has the higher Attack (125 vs 107), and has more bulk, counting HP, Defense and Sp. Def together (260 vs 253), but Decidueye has the higher Sp. Atk (100 vs 60) and resists Rillaboom’s own-type moves (½× at best).

Decidueye is ahead on

• has the higher Sp. Atk (100 vs 60)
• resists Rillaboom’s own-type moves (½× at best)

Rillaboom is ahead on

• is faster (85 vs 70 base Speed)
• has the higher Attack (125 vs 107)
• has more bulk, counting HP, Defense and Sp. Def together (260 vs 253)

This compares base numbers and the type chart; it does not predict a winner. A real battle also depends on level, nature and EVs, the moves each one knows (a Pokémon does not always learn a move of its own type), held items, weather and terrain, and abilities (Decidueye: Overgrow, Long Reach; Rillaboom: Overgrow, Grassy Surge), so either one can come out ahead.

Who moves first?

At Level 50 with 252 Speed EVs, 31 IVs and a neutral nature, Decidueye has 122 Speed and Rillaboom has 137, so Rillaboom moves first when both use moves of the same priority and no item, ability, status or stat change gets in the way.

Type matchup, both ways

Decidueye (Grass/Ghost) attacking Rillaboom

Grass ½×, Ghost 1×. Using only its own types, Decidueye hits Rillaboom for ½× with Grass moves (not very effective) and 1× with Ghost moves (normal damage).

Rillaboom (Grass) attacking Decidueye

Grass ½×. Using only its own type, Rillaboom hits Decidueye for ½× with Grass moves (not very effective).

What hits each one for 2× or more

• Decidueye: Fire 2× (super effective), Ice 2× (super effective), Flying 2× (super effective), Ghost 2× (super effective), Dark 2× (super effective).
• Rillaboom: Fire 2× (super effective), Ice 2× (super effective), Poison 2× (super effective), Flying 2× (super effective), Bug 2× (super effective).

The multipliers come from the 18×18 type chart; what a Pokémon can actually use depends on the moves it learns.

Abilities

Decidueye

• Overgrow. Strengthens Grass moves to inflict 1.5× damage at 1/3 max HP or less.
• Long Reach (hidden ability). This Pokémon's moves do not make contact.

Rillaboom

• Overgrow. Strengthens Grass moves to inflict 1.5× damage at 1/3 max HP or less.
• Grassy Surge (hidden ability). When this Pokémon enters battle, it changes the terrain to Grassy Terrain.

Size, generation and evolution

Rillaboom is taller (2.1 m vs 1.6 m for Decidueye), and Rillaboom is heavier (90 kg vs 36.6 kg for Decidueye).

Decidueye (#0724) is a Grass/Ghost-type Arrow Quill Pokémon from Alola, first seen in Generation 7, a starter Pokémon. Its evolution line is Rowlet → Dartrix → Decidueye.

Rillaboom (#0812) is a Grass-type Drummer Pokémon from Galar, first seen in Generation 8, a starter Pokémon. Its evolution line is Grookey → Thwackey → Rillaboom.

Keep exploring

• Open Decidueye and Rillaboom in the Compare tool
• Decidueye and Rillaboom Pokédex pages
• Grass/Ghost weaknesses · Grass type
• Speed tiers

More comparisons

• Decidueye vs Incineroar
• Decidueye vs Primarina
• Rillaboom vs Cinderace
• Rillaboom vs Inteleon
• Sceptile vs Rillaboom
• Sceptile vs Decidueye
• Greninja vs Decidueye
• Decidueye vs Meowscarada

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