Yamask
Ghost
Best attacking moveset: Astonish and Shadow Ball, worth 5.9 damage per second against a neutral target.
Best moveset
Yamask can learn 6 combinations. Astonish with Shadow Ball does the most damage per second of them, at level 40 with a perfect attack stat. Same-type moves get the 1.2× bonus, and the cycle assumes the charged attack fires the moment it has the energy.
Stats and moves come straight from the game's own data files. Every number on this page is a raid and gym number, not a PvP one.
Type matchups
| Fast attack | Type | Power | Duration | Energy |
|---|---|---|---|---|
| Astonish | Ghost | 7 | 1.0s | +13 |
| Zen Headbutt | Psychic | 11 | 1.0s | +9 |
| Charged attack | Type | Power | Duration | Energy |
|---|---|---|---|---|
| Dark Pulse | Dark | 80 | 3.0s | -50 |
| Ominous Wind | Ghost | 55 | 2.5s | -33 |
| Shadow Ball | Ghost | 100 | 3.0s | -50 |
Shiny
Yes. Shiny Yamask has been released. Players have found it from: wild, raid, research, photobomb.
Other forms
Evolution family
Numbers
| Max CP | 1,110 at level 50, 982 at level 40 |
|---|---|
| Raid catch | 561 CP at level 20, or 701 if weather boosted (perfect IVs) |
| Lowest possible raid catch | 516 CP. Raid encounters can't roll below 10/10/10 |
| Base stats | 95 attack · 141 defense · 116 stamina |
What it costs
| Candy to evolve | 25 Candy |
|---|---|
| Second charged move | 50,000 Stardust and 50 Candy |
| Buddy distance | 3 km per Candy |
| Purify a Shadow one | 3,000 Stardust and 3 Candy |
| Size | 0.5 m and 1.5 kg |
Best moveset against each type
Yamask does not have one best moveset, it has 3. Which one wins depends on what you are attacking, because a move only gets its bonus against something weak to it. Best against Ghost, Psychic, Fighting.
| Against | Best moveset | DPS |
|---|---|---|
| Ghost | Astonish + Shadow Ball | 9.1 |
| Psychic | Astonish + Shadow Ball | 9.1 |
| Fighting | Zen Headbutt + Shadow Ball | 6.6 |
| Poison | Zen Headbutt + Shadow Ball | 6.6 |
| Astonish + Shadow Ball | 5.9 | |
| Ground | Astonish + Shadow Ball | 5.9 |
| Rock | Astonish + Shadow Ball | 5.9 |
| Bug | Astonish + Shadow Ball | 5.9 |
| Steel | Astonish + Shadow Ball | 5.9 |
| Fire | Astonish + Shadow Ball | 5.9 |
| Water | Astonish + Shadow Ball | 5.9 |
| Grass | Astonish + Shadow Ball | 5.9 |
| Electric | Astonish + Shadow Ball | 5.9 |
| Ice | Astonish + Shadow Ball | 5.9 |
| Dragon | Astonish + Shadow Ball | 5.9 |
| Fairy | Astonish + Shadow Ball | 5.9 |
| Normal | Zen Headbutt + Dark Pulse | 4.3 |
| Dark | Astonish + Shadow Ball | 3.9 |
Same maths as the headline number, run once per defending type: level 40, perfect attack IV, and the target's own type taken into account. Sorted by damage, so the top of this table is what Yamask is actually for.
Counters: what beats Yamask
| Attacker | Type | Moveset | DPS |
|---|---|---|---|
 Blacephalon | FireGhost | Astonish + Shadow Ball | 37.6 |
 Darkrai | Dark | Snarl + Shadow Ball | 33.9 |
 Chandelure | GhostFire | Hex + Shadow Ball | 33.6 |
 Gengar | GhostPoison | Lick + Shadow Ball Legacy | 33.6 |
 Absol | Dark | Snarl + Brutal Swing Legacy | 32.9 |
 Dragapult | DragonGhost | Astonish + Shadow Ball | 32.1 |
 Hoopa | PsychicGhost | Astonish + Shadow Ball | 31.5 |
 Lunala | PsychicGhost | Shadow Claw + Shadow Ball | 31.4 |
 Eternatus | PoisonDragon | Dragon Tail + Dynamax Cannon Legacy | 31.4 |
 Gholdengo | SteelGhost | Hex + Shadow Ball | 31.4 |
Ranked by damage per second against Yamask's own defense, at level 40 with a 15 attack IV, one per evolution family.