Yamask (Galar) in Emerald Imperium

Ground / Ghost — where to catch it, what it learns, and how it differs from the official games.

Compared with the official games

Against the base species it is built from:

Stats Attack 30 → 55, Sp. Atk 55 → 30
Type Ghost → Ground / Ghost
Abilities gains Wandering Spirit, Shadow Shield and loses Mummy

Compared against present-day official data. The Fairy type and hidden abilities arrived after Pokémon Emerald, so a difference here can belong to the series rather than to this hack.

Other changes in this hack

Evolves into Runerigus at level 35
Egg moves: Memento

Yamask (Galar) in other guides

The same Pokémon, as 4 other hacks change it:

Emerald Rogue Radical Red Inclement Emerald Elite Redux

Where to find Yamask (Galar)

Area	Method	Level
Route 117	Grass	20-24	5% rare
Mt. Pyre 1F	Grass	35-40
Mt. Pyre 2F	Grass	35-40

Level-up moves

Lv	Move	Type	Cat	Pow	Acc	PP
1	Magnitude A ground-shaking attack of random intensity.	Ground	Phys	1	100	30
1	Protect Evades attack, but may fail if used in succession.	Normal	Stat	—	—	10
1	Shadow Sneak Extends the user's shadow to strike first.	Ghost	Phys	40	100	30
4	Haze Creates a black haze that eliminates all stat changes.	Ice	Stat	—	—	30
8	Night Shade Inflicts damage identical to the user's level.	Ghost	Spec	1	100	15
12	Disable Psychically disables one of the foe's moves.	Normal	Stat	—	100	20
14	Will-O-Wisp Inflicts a burn on the foe with intense fire.	Fire	Stat	—	85	15
16	Brutal Swing Violently swings around to hurt everyone nearby.	Dark	Phys	60	100	20
20	Crafty Shield Evades status moves for one turn.	Fairy	Stat	—	—	10
24	Hex Does double damage if the foe has a status problem.	Ghost	Spec	65	100	10
28	Mean Look Fixes the foe with a mean look that prevents escape.	Normal	Stat	—	—	5
32	Slam Slams the foe with a long tail, vine, etc.	Normal	Phys	80	100	20
36	Curse A move that functions differently for GHOSTS.	Ghost	Stat	—	—	10
40	Shadow Ball Hurls a black blob that may lower the foe's Sp. Def.	Ghost	Spec	80	100	15
44	Earthquake A powerful quake, but has no effect on flying foes.	Ground	Phys	100	100	10
48	Guard Split Averages changes to Defense and Sp. Def with the foe.	Psychic	Stat	—	—	10
48	Power Split Averages changes to Attack and Sp. Atk with the foe.	Psychic	Stat	—	—	10
52	Destiny Bond If the user faints, the foe is also made to faint.	Ghost	Stat	—	—	5

* a legal move, just moved to level-up · ** new to this hack

TMs & HMs (21)

#	Move · where to get it	Type	Pow
TM04	Calm Mind	Psychic	—
TM18	Rain Dance	Water	—
TM26	Earthquake	Ground	100
TM29	Psychic	Psychic	90
TM30	Shadow Ball	Ghost	80
TM37	Sandstorm	Rock	—
TM39	Rock Tomb	Rock	60
TM46	Thief	Dark	60
TM53	Energy Ball	Grass	90
TM61	Will-O-Wisp	Fire	—
TM67	Poltergeist	Ghost	110
TM79	Dark Pulse	Dark	80
TM80	Rock Slide	Rock	75
TM106	Trick Room	Psychic	—
TM124	Pain Split	Normal	—
TM125	Zen Headbutt	Psychic	80
TM128	Hex	Ghost	65
TM132	Knock Off	Dark	65
TM140	Iron Defense	Steel	—
TM141	Nasty Plot	Dark	—
TM142	Earth Power	Ground	90