Grass-type Pokémon are generally considered to be strong against Water-type Pokémon, including Gyarados. This is because Grass-type moves are super effective against Water-type Pokémon.
However, Gyarados is a dual-type Pokémon, meaning it has both Water and Flying types. This means that Grass-type moves are only super effective against its Water-type, but they are not very effective against its Flying-type.
Therefore, while Grass-type Pokémon can be effective against Gyarados, they are not guaranteed to win.
Here's a breakdown of the effectiveness of Grass-type moves against Gyarados:
- Grass-type moves are super effective against Gyarados's Water-type. This means they will deal double damage.
- Grass-type moves are not very effective against Gyarados's Flying-type. This means they will deal half damage.
Therefore, while Grass-type Pokémon can be effective against Gyarados, it's important to consider its Flying-type as well.