| Type | ghost |
| Category | Physical |
| Power | 30 |
| Accuracy | 100 |
| PP | 15 |
| Introduced | Generation 3 |
Astonish deals damage and has a 30% chance of causing the target to flinch (if the target has not yet moved).
Pokémon with the ability Inner Focus or those behind a Substitute cannot be made to flinch.
When a Pokémon is holding Ghostium Z and uses its Z-Power, Astonish turns into Never-Ending Nightmare and has base power 100.
| Ruby Sapphire Emerald | An attack that may shock the foe into flinching. |
| FireRed LeafGreen | An attack using a startling shout. It also may make the foe flinch. |
| Diamond Pearl Platinum HeartGold SoulSilver | The user attacks the foe while shouting in a startling fashion. It may also make the target flinch. |
| Black White Black 2 White 2 | The user attacks the target while shouting in a startling fashion. It may also make the target flinch. |
| X Y O.Ruby A.Sapphire | The user attacks the target while shouting in a startling fashion. This may also make the target flinch. |
| Sun Moon Ultra Sun Ultra Moon | The user attacks the target while shouting in a startling fashion. This may also make the target flinch. |
| Sword Shield B.Diamond S.Pearl | The user attacks the target while shouting in a startling fashion. This may also make the target flinch. |
| English | Astonish |
|---|---|
| Spanish | Impresionar |
| Italian | Sgomento |
| Japanese | おどろかす (Odorokasu) |
| German | Erstauner |
| French | Étonnement |