Head to head

Greninja vs Decidueye

Greninja and Decidueye have the same base stat total (530), Greninja is faster (base Speed 122 vs 70), and each can hit the other super effectively with its own types (Greninja’s Dark moves hit Decidueye for 2×; Decidueye’s Grass moves hit Greninja for 2×).

Starter finals from Kalos and Alola that fans often line up against each other.

Base stats side by side

Who has the edge?

Greninja is faster (122 vs 70 base Speed), has the higher Sp. Atk (103 vs 100), and hits Decidueye for 2× with its Dark moves, but Decidueye has the higher Attack (107 vs 95), has more bulk, counting HP, Defense and Sp. Def together (253 vs 210), and hits Greninja for 2× with its Grass moves.

Greninja is ahead on

• is faster (122 vs 70 base Speed)
• has the higher Sp. Atk (103 vs 100)
• hits Decidueye for 2× with its Dark moves

Decidueye is ahead on

• has the higher Attack (107 vs 95)
• has more bulk, counting HP, Defense and Sp. Def together (253 vs 210)
• hits Greninja for 2× with its Grass moves

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 (Greninja: Torrent, Protean; Decidueye: Overgrow, Long Reach), so either one can come out ahead.

Who moves first?

At Level 50 with 252 Speed EVs, 31 IVs and a neutral nature, Greninja has 174 Speed and Decidueye has 122, so Greninja 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

Greninja (Water/Dark) attacking Decidueye

Water ½×, Dark 2×. Using only its own types, Greninja hits Decidueye for ½× with Water moves (not very effective) and 2× with Dark moves (super effective).

Decidueye (Grass/Ghost) attacking Greninja

Grass 2×, Ghost ½×. Using only its own types, Decidueye hits Greninja for 2× with Grass moves (super effective) and ½× with Ghost moves (not very effective).

What hits each one for 2× or more

• Greninja: Electric 2× (super effective), Grass 2× (super effective), Fighting 2× (super effective), Bug 2× (super effective), Fairy 2× (super effective).
• Decidueye: Fire 2× (super effective), Ice 2× (super effective), Flying 2× (super effective), Ghost 2× (super effective), Dark 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

Greninja

• Torrent. Strengthens Water moves to inflict 1.5× damage at 1/3 max HP or less.
• Protean (hidden ability). Changes the bearer's type to match each move it uses.

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.

Size, generation and evolution

Decidueye is taller (1.6 m vs 1.5 m for Greninja), and Greninja is heavier (40 kg vs 36.6 kg for Decidueye).

Greninja (#0658) is a Water/Dark-type Ninja Pokémon from Kalos, first seen in Generation 6, a starter Pokémon. Its evolution line is Froakie → Frogadier → Greninja.

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.

Keep exploring

• Open Greninja and Decidueye in the Compare tool
• Greninja and Decidueye Pokédex pages
• Water/Dark weaknesses · Grass/Ghost weaknesses
• Speed tiers

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• Lucario vs Greninja
• Blastoise vs Greninja
• Sceptile vs Decidueye

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