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

Blastoise 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

Blastoise

1.6 m, 85.5 kg

Abilities: Torrent, Rain Dish (hidden)

Base stat total 530.

Form 2 Mega Battle only

100 more base stat points, spread differently

1.6 m, 101.1 kg, from X and Y, 101 moves in its learnset

Stat	Default	This form	Change
HP	79	79	0
Attack	83	103	+20
Defense	100	120	+20
Sp. Atk	85	135	+50
Sp. Def	105	115	+10
Speed	78	78	0
Total	530	630	+100

Form 1 Gigantamax Battle only

same types and stats as the default

25.0 m, 1000.0 kg, from Sword and Shield

Abilities: Torrent, Rain Dish (hidden)

Stats match the default form.