
| Catch rate | 190 |
| Base Friendship | 50 (normal) |
| Base Exp | 61 |
| Growth Rate | Medium Fast |
| Egg Groups | Amorphous, Mineral |
| Gender | 50% male, 50% female |
| Egg cycles | 25 (6,169–6,425 steps) |
| HP | 38 | |
| Attack | 30 | |
| Defense | 85 | |
| Sp. Atk | 55 | |
| Sp. Def | 65 | |
| Speed | 30 | |
| Total | 303 |
| Level | Move | Type | Category | Power | Accuracy |
|---|---|---|---|---|---|
| 1 | Astonish | ghost | physical | 30 | 100 |
| 1 | Protect | normal | status | 0 | — |
| 4 | Haze | ice | status | 0 | — |
| 8 | Night Shade | ghost | special | 0 | 100 |
| 12 | Disable | normal | status | 0 | 100 |
| 16 | Will-O-Wisp | fire | status | 0 | 85 |
| 20 | Crafty Shield | fairy | status | 0 | — |
| 24 | Hex | ghost | special | 65 | 100 |
| 28 | Mean Look | normal | status | 0 | — |
| 32 | Grudge | ghost | status | 0 | — |
| 36 | Curse | ghost | status | 0 | — |
| 40 | Shadow Ball | ghost | special | 80 | 100 |
| 44 | Dark Pulse | dark | special | 80 | 100 |
| 48 | Guard Split | psychic | status | 0 | — |
| 48 | Power Split | psychic | status | 0 | — |
| 52 | Destiny Bond | ghost | status | 0 | — |
Yamask does not learn any moves from evolution.
| Move | Type | Category | Power | Accuracy |
|---|---|---|---|---|
| Poltergeist | ghost | physical | 110 | 90 |
| TM | Move | Type | Category | Power | Accuracy |
|---|---|---|---|---|---|
| 19 | Safeguard | normal | status | 0 | — |
| 21 | Rest | psychic | status | 0 | — |
| 23 | Thief | dark | physical | 60 | 100 |
| 24 | Snore | normal | special | 50 | 100 |
| 25 | Protect | normal | status | 0 | — |
| 31 | Attract | normal | status | 0 | 100 |
| 33 | Rain Dance | water | status | 0 | — |
| 38 | Will-O-Wisp | fire | status | 0 | 85 |
| 39 | Facade | normal | physical | 70 | 100 |
| 44 | Imprison | psychic | status | 0 | — |
| 47 | Fake Tears | dark | status | 0 | 100 |
| 57 | Payback | dark | physical | 50 | 100 |
| 70 | Trick Room | psychic | status | 0 | — |
| 71 | Wonder Room | psychic | status | 0 | — |
| 76 | Round | normal | special | 60 | 100 |
| 77 | Hex | ghost | special | 65 | 100 |
| TR | Move | Type | Category | Power | Accuracy |
|---|---|---|---|---|---|
| 11 | Psychic | psychic | special | 90 | 100 |
| 20 | Substitute | normal | status | 0 | — |
| 26 | Endure | normal | status | 0 | — |
| 27 | Sleep Talk | normal | status | 0 | — |
| 33 | Shadow Ball | ghost | special | 80 | 100 |
| 38 | Trick | psychic | status | 0 | 100 |
| 40 | Skill Swap | psychic | status | 0 | — |
| 46 | Iron Defense | steel | status | 0 | — |
| 49 | Calm Mind | psychic | status | 0 | — |
| 54 | Toxic Spikes | poison | status | 0 | — |
| 58 | Dark Pulse | dark | special | 80 | 100 |
| 65 | Energy Ball | grass | special | 90 | 100 |
| 68 | Nasty Plot | dark | status | 0 | — |
| 69 | Zen Headbutt | psychic | physical | 80 | 90 |
| 83 | Ally Switch | psychic | status | 0 | — |
| English | Yamask |
|---|---|
| Spanish | Yamask |
| Italian | Yamask |
| Japanese | デスマス (Desumasu) |
| German | Makabaja |
| French | Tutafeh |
| Black White Black 2 White 2 | Relic Castle |
|---|---|
| X Y | Trade/migrate from another game |
| Omega Ruby Alpha Sapphire | Cofagrigus |
| Sun Moon Ultra Sun Ultra Moon | Trade/migrate from another game |
| Let's Go Pikachu Let's Go Eevee | Not available in this game |
| Sword Shield | Route 6 |
| Brilliant Diamond Shining Pearl | Not available in this game |