Blastoise is a large, bipedal turtle Pokémon. Its body is blue and is mostly hidden by its tough, brown shell. This shell has a cream-colored underside and a white ridge encircling its arms and separating the upper and lower halves. Two powerful water cannons reside at the top of its shell over its shoulders. These cannons can be extended or withdrawn. Blastoise's head has triangular ears that are black on the inside, small brown eyes, and a cream-colored lower jaw. Its arms are thick, and it has three claws on each hand. Its feet have three claws on the front and one on the back. Poking out of the bottom of its shell is a stubby tail.

The powerful cannons on this Pokémon's back are capable of producing water blasts that can pierce steel and concrete and can be used for high-speed charges. Blastoise deliberately makes itself heavy to withstand these powerful blasts and to crush its opponents. In Generation II, Skull Bash was its signature move. The anime has shown that Blastoise can take the role of a leader in large groups of Squirtle and Wartortle. Its preferred habitat seems to be freshwater ponds and lakes.

Forms

Blastoise has two forms: Mega Blastoise and Gigantamax Blastoise.

When Mega Evolved, Blastoise develops two smaller shells over its arms, each with their own water cannon. The two cannons on its back are replaced by a single, central water cannon of greater size that can retract into its shell. This cannon extends forward over Mega Blastoise's head and is said to have a blast range of over 6 miles (10 kilometers). Small ridges develop over its now-red eyes and extend to its ears. The ears angle slightly backward and there is a small point on its chin.

As Gigantamax Blastoise, it becomes larger. Its eyes are white with bright blue sclerae. Its blue arms, head and legs change to light blue, and the underside of its shell becomes dark red. Its shell transforms into a battleship-like formation, with 31 cannons of different sizes: sets of twin cannons emerge from hexagon and rectangle-shaped holes within the shell, and a main cannon protrudes from the center. Several white triangular spots are located on its tail and legs. Three red clouds surround the main cannon.

Gigantamax Blastoise can adapt to any situation using various cannon combinations. It is not very good at precision shooting, so instead of aiming its attacks, it prefers to overwhelm its opponent by launching dynamic, powerful torrents from its cannons. According to one legend, its main cannon is so staggeringly powerful it can blast holes through the mountains. Gigantamax Blastoise can also align the 12 cannons surrounding its main cannon individually to attack in any direction.

Gigantamax Blastoise is the only known Pokémon capable of using the G-Max Move G-Max Cannonade.

Evolution

Blastoise evolves from and is the final form of .

(Source: Bulbapedia)