Gengar has 2 alternate forms, 0 change type and 1 change stats

Gengar and its 2 alternate forms, of the 1,025 species this site covers

Alternate forms2

Change type0

Change stats1

Largest total shift+100

Default form

Gengar

1.5 m, 40.5 kg

Base stat total 500.

Form 2 Mega Battle only

100 more base stat points, spread differently

1.4 m, 40.5 kg, from X and Y, 105 moves in its learnset

Abilities: Shadow Tag

Stat	Default	This form	Change
HP	60	60	0
Attack	65	65	0
Defense	60	80	+20
Sp. Atk	130	170	+40
Sp. Def	75	95	+20
Speed	110	130	+20
Total	500	600	+100

Form 1 Gigantamax Battle only

same types and stats as the default

20.0 m, 1000.0 kg, from Sword and Shield

Stats match the default form.