Merciless (Japanese: ひとでなし, Hepburn: Hitodenashi) is an Ability exclusive to Mareanie and Toxapex, introduced in Generation VII.
Effect[]
| Generations | Description |
|---|---|
| Generation VII | The Pokémon's attacks become critical hits if the target is poisoned. |
| Generation VIII | |
| Generation IX |
Pokémon[]
| Pokémon | Type | First Ability | Second Ability | Hidden Ability | |
|---|---|---|---|---|---|
 | Mareanie |  Poison /  Water | Merciless | Limber | Regenerator |
 | Toxapex | Poison / Water | Merciless | Limber | Regenerator |