In Crippling Medical Debt: First found in Route 104 (Grass, Lv 15-18). The game's documentation doesn't give its type or base stats.
Level-up moves 16
| Lv | Move | Type | Cat | Pow | Acc | PP |
|---|---|---|---|---|---|---|
| 1 | Astonish | — | — | |||
| 1 | Protect | — | — | |||
| 4 | Haze | — | — | |||
| 8 | Night Shade | — | — | |||
| 12 | Disable | — | — | |||
| 16 | Will-O-Wisp | — | — | |||
| 20 | Crafty Shield | — | — | |||
| 24 | Hex | — | — | |||
| 28 | Mean Look | — | — | |||
| 32 | Grudge | — | — | |||
| 36 | Curse | — | — | |||
| 40 | Shadow Ball | — | — | |||
| 44 | Dark Pulse | — | — | |||
| 48 | Guard Split | — | — | |||
| 48 | Power Split | — | — | |||
| 52 | Destiny Bond | — | — |
* a legal move, just moved to level-up · ** new to this game
TMs & HMs 27
| # | Move · where to get it | Type | Pow |
|---|---|---|---|
| TM04 | Calm Mind Fortree City Gym | — | |
| TM06 | Toxic Lavaridge Town Gym | — | |
| TM10 | Hidden Power Slateport City | — | |
| TM17 | Protect Fortree City Decoration Shop | — | |
| TM18 | Rain Dance Route 118 | — | |
| TM20 | Safeguard Petalburg City Mart | — | |
| TM21 | Frustration Rustboro City Dorm 1F | — | |
| TM27 | Return Rustboro City Dorm 1F | — | |
| TM29 | Psychic Forest Drive Ranger HQ | — | |
| TM30 | Shadow Ball Forest Drive Ranger HQ | — | |
| TM32 | Double Team Lilycove City Department Store 4F | — | |
| TM34 | Shock Wave Forest Drive Ranger HQ | — | |
| TM42 | Facade Forest Drive Ranger HQ | — | |
| TM43 | Secret Power Route 111; Slateport City | — | |
| TM44 | Rest Mossdeep City Gym | — | |
| TM45 | Attract Forest Drive Ranger HQ | — | |
| TM46 | Thief Mauville City Police Station | — | |
| TM48 | Skill Swap Forest Drive Ranger HQ | — | |
| TM49 | Snatch Forest Drive Ranger HQ | — | |
| TM51 | Swagger Petalburg City Gym | — | |
| TM57 | Lucky Chant Dewford Town Hall | — | |
| TM62 | Haze Rustboro City Frat B1F | — | |
| TM64 | Spite Pacifidlog Town | — | |
| TM65 | Trick Room Pacifidlog Town Gym | — | |
| TM70 | Metronome Underwater Route 118 Cave | — | |
| TM72 | Imprison Route 117 Day Care Basement | — | |
| HM05 | Flash Slateport City | — |
Where to find Yamask
| Area | Method | Level | |
|---|---|---|---|
| Route 104 | Grass | 15-18 | 5% rare |
Other changes in this game
- Evolves into Cofagrigus at Level 34
- Egg moves: Ally Switch, Crafty Shield, Disable, Endure, Fake Tears, Heal Block, Imprison, Memento, Nasty Plot, Nightmare, Toxic Spikes
- Tutor moves: After You, Ally Switch, Block, Confide, Dark Pulse, Dream Eater, Embargo, Endure, Energy Ball, Fake Tears, Hex, Infestation, Iron Defense, Knock Off, Magic Coat, Nasty Plot, Pain Split, Payback, Psych Up, Role Play, Round, Sleep Talk, Snore, Telekinesis, Toxic Spikes, Trick, Will-O-Wisp, Wonder Room, Zen Headbutt