Blastoise is a large, bipedal, blue tortoise-like Pokémon with a tough brown shell and two powerful water cannons, which are like steel in appearance, that jut out of the top sides of its shell. The cannons can be withdrawn inside the shell, or rotated to point backwards; this enables Blastoise to commence jet assisted rams. Blastoise’s head sports triangular ears and is strong and sturdy in shape, allowing it to ram into foes in battle. Blastoise’s arms are thick and patterned with striations, possessing three claws on the hands. The white rim of the shell also encircles the arm. Unlike Wartortle and Squirtle, Blastoise’s tail is blue and stubby. Nelson's Blatoise has strange green markings on it's body, and markings on it's shell, possibly due to age.
Blastoise can shoot water from its cannons with enough force to punch holes in steel, and enough accuracy to hit an empty can 160 feet away. Blastoise also has the ability to learn Ice-type moves like Ice Beam and Blizzard. Since Blastoise is a fully evolved Water-type Starter Pokémon, it can use Hyper Beam, Giga Impact and Hydro Cannon. It can spin very fast in its shell to knock enemies out of its path. Despite not having Steel as it's secondary type, it does however gain access to Steel-type moves such as Gyro Ball, and Flash Cannon, which helps it in battles against types that resist its Water-type moves.
It's ability, Torrent, increases the power of it's Water-type moves by 1.5× if the user has less than or equal to ⅓ of its maximum HP remaining.