Greninja has 3 alternate forms, 0 change type and 2 change stats

Greninja and its 3 alternate forms, of the 1,025 species this site covers

Alternate forms3

Change type0

Change stats2

Largest total shift+110

Default form

Greninja

1.5 m, 40 kg

Abilities: Torrent, Protean (hidden)

Base stat total 530.

Form 2

same types and stats as the default

1.5 m, 40.0 kg, from Sun and Moon, 63 moves in its learnset

Abilities: Battle Bond

Stats match the default form.

Form 3 Battle only

110 more base stat points, spread differently

1.5 m, 40.0 kg, from Sun and Moon, 81 moves in its learnset

Abilities: Battle Bond

Stat	Default	This form	Change
HP	72	72	0
Attack	95	145	+50
Defense	67	67	0
Sp. Atk	103	153	+50
Sp. Def	71	71	0
Speed	122	132	+10
Total	530	640	+110

Form 4 Mega Battle only

100 more base stat points, spread differently

1.5 m, 40.0 kg, from Mega Dimension, 64 moves in its learnset

Abilities: Protean

Stat	Default	This form	Change
HP	72	72	0
Attack	95	125	+30
Defense	67	77	+10
Sp. Atk	103	133	+30
Sp. Def	71	81	+10
Speed	122	142	+20
Total	530	630	+100