GrassWhistle puts the target to sleep. It will not affect a target that already has a major status ailment, a Substitute, or Insomnia, Vital Spirit, or Soundproof as their ability.
Template:Breedlist
|-
| style="background: #FFF; font-family:monospace,monospace" | 0001
| style="background: #FFF; text-align: center;" |
| style="background: #FFF" | Bulbasaur
| colspan="1" style="background:#3FA129; text-align: center;" | Grass || style="background:#9141CB" align="center" colspan="1" rowspan="1" | Poison
| style="background: #FFF" | Roselia
|-
| style="background: #FFF; font-family:monospace,monospace" | 0152
| style="background: #FFF; text-align: center;" |
| style="background: #FFF" | Chikorita
| colspan="2" style="background:#3FA129; text-align: center;" | Grass
| style="background: #FFF" | Roselia
|-
| style="background: #FFF; font-family:monospace,monospace" | 0191
| style="background: #FFF; text-align: center;" |
| style="background: #FFF" | Sunkern
| colspan="2" style="background:#3FA129; text-align: center;" | Grass
| style="background: #FFF" | Roselia
|-
| style="background: #FFF; font-family:monospace,monospace" | 0331
| style="background: #FFF; text-align: center;" |
| style="background: #FFF" | Cacnea
| colspan="2" style="background:#3FA129; text-align: center;" | Grass
| style="background: #FFF" | Roselia
|-
| colspan="6" | Bold indicates a Pokémon which gets STAB from this move. Italic indicates a Pokémon whose evolution gets STAB from this move. *Indicates Pokémon that can only learn the move through chain breeding.
|}
|}
Template:Breedlist
|-
| style="background: #FFF; font-family:monospace,monospace" | 0001
| style="background: #FFF; text-align: center;" |
| style="background: #FFF" | Bulbasaur
| colspan="1" style="background:#3FA129; text-align: center;" | Grass || style="background:#9141CB" align="center" colspan="1" rowspan="1" | Poison
| style="background: #FFF" | Sunkern, Sunflora Roselia Snover, Abomasnow
|-
| style="background: #FFF; font-family:monospace,monospace" | 0152
| style="background: #FFF; text-align: center;" |
| style="background: #FFF" | Chikorita
| colspan="2" style="background:#3FA129; text-align: center;" | Grass
| style="background: #FFF" | Sunkern, Sunflora Roselia Snover, Abomasnow
|-
| style="background: #FFF; font-family:monospace,monospace" | 0191
| style="background: #FFF; text-align: center;" |
| style="background: #FFF" | Sunkern
| colspan="2" style="background:#3FA129; text-align: center;" | Grass
| style="background: #FFF" | Sunkern, Sunflora Roselia Snover, Abomasnow
|-
| style="background: #FFF; font-family:monospace,monospace" | 0252
| style="background: #FFF; text-align: center;" |
| style="background: #FFF" | Treecko
| colspan="2" style="background:#3FA129; text-align: center;" | Grass
| style="background: #FFF" | Snover, Abomasnow
|-
| style="background: #FFF; font-family:monospace,monospace" | 0331
| style="background: #FFF; text-align: center;" |
| style="background: #FFF" | Cacnea
| colspan="2" style="background:#3FA129; text-align: center;" | Grass
| style="background: #FFF" | Sunkern, Sunflora Roselia Snover, Abomasnow
|-
| style="background: #FFF; font-family:monospace,monospace" | 0420
| style="background: #FFF; text-align: center;" |
| style="background: #FFF" | Cherubi
| colspan="2" style="background:#3FA129; text-align: center;" | Grass
| style="background: #FFF" | Sunkern, Sunflora Roselia Snover, Abomasnow
|-
| colspan="6" | Bold indicates a Pokémon which gets STAB from this move. Italic indicates a Pokémon whose evolution gets STAB from this move. *Indicates Pokémon that can only learn the move through chain breeding.
|}
|}