Allister (Masters)

	Allister (Fall 2022); オニオン（２２シーズン） Onion (2022 Season)
	; Allister's model (Fall 2022)
No.	142
English voice actor	Nicole Gose
Japanese voice actor	Ryō Hirohashi
Description	Allister's enjoying a festival that might be a little scary. He's more excited than usual wearing his mask that matches his partner, Gourgeist.

	Allister; オニオン Onion
	; Allister's model
No.	142
English voice actor	Nicole Gose
Japanese voice actor	Ryō Hirohashi
Description	This Ghost-type Gym Leader keeps his face hidden behind a mask and has one hundred copies of it. He likes to be alone in places like ancient ruins and graveyards.

Allister (Japanese: オニオン Onion) is a Pokémon Trainer in Pokémon Masters EX, based on the character of the same name in the core series games. He forms a sync pair with Gengar, which is capable of Gigantamaxing. The sync pair can be obtained through the sync pair scout, starting on October 22, 2021. The pair's potential can be upgraded to 6★ EX, which unlocks Allister's EX style.

Allister is also available in his Fall 2022 attire, paired along Super Size Gourgeist. This pair could be obtained through a limited seasonal sync pair scout and was first made available on October 19, 2022. This pair can also be upgraded to 6★ EX since its release.

In the games

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Gengar

Stats	HP	Attack	Defense	Sp. Atk	Sp. Def	Speed
		Type			Ghost
		Move types			Ghost / Fighting / Poison
		Role			Tech
		Base Potential			★★★★★☆EX
Gengar ♂	Weakness			Ground
You can hear tales told all over the world about how Gengar will pay a visit to children who are naughty.
Lv. 140, Base Potential	641	132	160	331	177	300
Lv. 140, Max Potential	741	172	200	371	217	340
Mega Gengar
Lv. 140, Base Potential	—	—	—	—	—	—
Lv. 140, Max Potential	—	—	—	—	—	—

Availability

Allister is available in the permanent sync pair scout pool. His offering rate was increased in the following sync pair scouts:

Banner	Dates	Notes
Allister Spotlight Scout	October 22 to November 8, 2021	Debut
Triple Feature Spotlight Scout	May 23 to June 6, 2022
All banners lasted from 06:00 UTC on the start date to 05:59 UTC on the end date unless noted otherwise.

Moves

Name	Type	Category	Move gauge	Base Power	Max Power	Accuracy	Target	Description
Shadow Ball	Ghost	Special	3	99	118	100%	An opponent	Has a chance (20%) of lowering the target's Sp. Def by one stat rank.
Drain Punch	Fighting	Physical	3	91	109	100%	An opponent	The more damage dealt to the target, the more this move restores the user's HP.
Sludge Bomb	Poison	Special	3	92	110	100%	An opponent	Has a chance (30%) of leaving the target poisoned.
No Escape!	None	Status	0 (2 uses)	—	—	—	Self	Raises the user's Sp. Atk and critical-hit rate by two stat ranks. Applies the Free Move Next effect to the user.
Sync moves
Silent Mystery Ghost Beam	Ghost	Special	—	200	240	—	An opponent	This move's power increases when the target is restrained. (6★ EX effect: Sync move power will be multiplied by 1.5.)
Max moves
G-Max Terror	Ghost	Special	0 (1 use)	400	480	—	An opponent	Applies the Restrain effect to all opposing sync pairs.
Max Knuckle	Fighting	Physical	0 (1 use)	400	480	—	An opponent	Raises the Attack of all allied sync pairs by two stat ranks.
Max Ooze	Poison	Special	0 (1 use)	400	480	—	An opponent	Raises the Sp. Atk of all allied sync pairs by two stat ranks.

Skills

Name	Description
Passive Skills
Hold Hostage 3	Powers up the user's moves when the target is restrained.
Toxic Power 3	Powers up the user's moves when the target is poisoned or badly poisoned.
Hostile Environment 3	Raises the chance of inflicting status conditions with the additional effects of moves.
Theme Skills
Ghost Tech	Raises allies' Attack and Sp. Atk by 24 when using Ghost-type attacks. Raises the maximum HP of all allied sync pairs by 24.
Galar Tech	Raises the Attack and Sp. Atk of all allied sync pairs by 4. Raises the maximum HP of all allied sync pairs by 7.
Gym Leader Tech	Raises the Attack and Sp. Atk of all allied sync pairs by 4. Raises the maximum HP of all allied sync pairs by 7.
Masked Tech	Raises the Attack and Sp. Atk of all allied sync pairs by 5. Raises the maximum HP of all allied sync pairs by 8.
Supernatural Tech	Raises the Attack and Sp. Atk of all allied sync pairs by 5. Raises the maximum HP of all allied sync pairs by 8.
Expedition Skills
Fiery ↑ 1 Soothing ↑ 1	Raises the following discovery levels by 1: • Fiery Crystal • Soothing Crystal

Sync grid

Allister & Gengar's sync grid is an expanded grid, made available since the sync pair was first released. It was further expanded on March 25, 2025.

Name	Effect	Energy required	Sync orb required	Move level required
HP +10	HP +10	0	5	1
HP +10	HP +10	2	24	1
HP +10	HP +10	2	24	1
HP +40	HP +40	0	5	1
Attack +5	Attack +5	0	5	1
Attack +5	Attack +5	2	24	1
Attack +10	Attack +10	4	48	2
Defense +5	Defense +5	0	5	1
Defense +5	Defense +5	2	24	1
Defense +10	Defense +10	4	48	1
Sp. Atk +5	Sp. Atk +5	0	5	1
Sp. Atk +5	Sp. Atk +5	2	24	1
Sp. Atk +10	Sp. Atk +10	4	48	2
Sp. Atk +20	Sp. Atk +20	0	5	1
Sp. Def +5	Sp. Def +5	0	5	1
Sp. Def +5	Sp. Def +5	2	24	1
Sp. Def +10	Sp. Def +10	4	48	1
Speed +5	Speed +5	0	5	1
Speed +5	Speed +5	2	24	1
Speed +5	Speed +5	2	24	1
Speed +10	Speed +10	4	48	1
Shadow Ball: Power +3	Shadow Ball: Power ↑ +3	3	36	1
Shadow Ball: Power +3	Shadow Ball: Power ↑ +3	3	36	1
Shadow Ball: Power +3	Shadow Ball: Power ↑ +3	3	36	1
Shadow Ball: Power +3	Shadow Ball: Power ↑ +3	3	36	2
Shadow Ball: Move Gauge Refresh 3	Has a chance (40%) of charging the user's move gauge by one when a move is successful.	7	84	1
Shadow Ball: Hold Hostage 2	Has a chance (40%) of charging the user's move gauge by one when a move is successful.	9	108	2
Shadow Ball: On a Roll 4	Raises the chance of lowering stat values with the additional effects of the user's moves.	3	36	2
Drain Punch: Power +4	Drain Punch: Power ↑ +4	4	48	1
Drain Punch: Power +4	Drain Punch: Power ↑ +4	4	48	1
Drain Punch: Move Gauge Refresh 9	Charges the user's move gauge by one when its move is successful.	9	108	3
Drain Punch: Mad Strength 4	Has a chance (50%) of raising the user's Attack by one stat rank when one of its attack moves is successful.	8	96	2
Sludge Bomb: Power +3	Sludge Bomb: Power ↑ +3	3	36	1
Sludge Bomb: Power +3	Sludge Bomb: Power ↑ +3	3	36	1
Sludge Bomb: Power +3	Sludge Bomb: Power ↑ +3	3	36	2
Sludge Bomb: Power +3	Sludge Bomb: Power ↑ +3	3	36	2
Sludge Bomb: Move Gauge Refresh 3	Has a chance (40%) of charging the user's move gauge by one when a move is successful.	7	84	1
Sludge Bomb: Toxic Power 2	Powers up the user's moves when the target is poisoned or badly poisoned.	9	108	2
No Escape!: MP Refresh 2	Has a chance (30%) of restoring one MP of the user's move when that move is successful.	7	84	2
Natural Remedy	Removes all status conditions from the user the first time it is inflicted by any status condition each battle.	7	84	2
Virulent Toxin 5	Powers up the user's sync move when the target is poisoned or badly poisoned.	8	96	2
Brainy Rush 2	Raises the user's Sp. Atk by two stat ranks after using its sync move.	8	96	2
MAX Double Down 5	Powers up the user's max moves that are super effective.	3	36	2
Sharp Entry 1	Raises the user's critical-hit rate by one stat rank when it enters a battle.	8	96	3
Superduper Effective 2	Powers up moves that are super effective.	10	120	3
Grappling Sync	Applies the Restrain effect to the target when a sync move targeting an opponent is successful.	10	120	3
MAX Super Preparation	Applies the Supereffective ↑ Next effect to the user after using its max move.	8	96	3
Hit Restrained Opp: MG ↑2 9	Charges the user's move gauge by two when its attack move is successful against a restrained opponent.	5	60	3
Restraining Sync-Up 9	Powers up the user's sync move when the target is restrained.	5	60	3
G-Max Terror: Power +100	G-Max Terror: Power ↑ +100	8	96	3
Max Knuckle: Power +100	Max Knuckle: Power ↑ +100	8	96	3
Max Ooze: Power +100	Max Ooze: Power ↑ +100	8	96	3
Silent Mystery Ghost Beam: Power +25	Silent Mystery Ghost Beam: Power ↑ +25	5	60	3
Silent Mystery Ghost Beam: Power +25	Silent Mystery Ghost Beam: Power ↑ +25	5	60	3