| Grasswhistle | Details | Level Up | TM | Move Tutor | Egg Move |
| Gen IX Dex | Gen VIII Dex | Gen VII Dex | Gen VI Dex | Gen V Dex |
| Gen IV Dex | Gen III Dex |
| Attack Name | Battle Type | Contest Type |
| Grasswhistle |  |  |
| Power Points | Base Power | Accuracy |
| 15 | 0 | 55 |
| Battle Effect: Lulls the foe into sleep with a pleasant melody. |
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| Secondary Effect: Induces sleep. | Effect Rate: -- % |
|
| TM # | Appeal Points | Jam Points |
| None | 
| 
|
| Contest Effect: Badly startles those that have made appeals. |
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| BrightPowder | King's Rock | Physical Contact |
| Yes | No | No |
| Battle Palace Style | Battle Arena | Pokémon Hit in Battle |
| Assist | +0 | Selected target |
| Picture Example of Grasswhistle | ||
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Pokémon That Learn Grasswhistle By Level Up in Ruby/Sapphire/Emerald/Colosseum/XD:
| No. | Pic | Name | Type 1 | Type 2 |
| #315 |  | Roselia |  |  |
Pokémon That Learn Grasswhistle By Level Up in Fire Red/Leaf Green:
| No. | Pic | Name | Type 1 | Type 2 |
| #315 | | Roselia | | |
Pokémon That Learn Grasswhistle By Breeding:
| No. | Pic | Name | Type 1 | Type 2 |
| #001 |  | Bulbasaur | | |
| #002 |  | Ivysaur | | |
| #003 |  | Venusaur | | |
| #152 |  | Chikorita | |  |
| #153 |  | Bayleef | | |
| #154 |  | Meganium | | |
| #191 |  | Sunkern | | |
| #192 |  | Sunflora | | |
| #331 |  | Cacnea | | |
| #332 |  | Cacturne | |  |
Pokémon That Learn Grasswhistle By Purifying or A Special Way:
| No. | Pic | Name | Type 1 | Type 2 |