Squirtle is a small Pokémon that resembles a light blue turtle. While it typically walks on its two short legs, it has been shown to run on all fours in Super Smash Bros. Brawl. It has large brown eyes and a slightly hooked upper lip. Each of its hands and feet have three pointed digits. The end of its long tail curls inward. Its body is encased by a tough shell that forms and hardens after birth. This shell is brown on the top, pale yellow on the bottom, and has a thick white ridge between the two halves.

Chikorita is a small, pale green Pokémon with a darker necklace of buds. It has a large head in proportion to the rest of its body with large red eyes that appear to have no pupils. It has four short legs with a single nailed toe on each and a small tail. Its most distinguishing feature is the large leaf on the top of its head, which is usually longer than the rest of its body. Aside from the soothing aroma that wafts from its leaf, Chikorita uses its leaf to determine the temperature and humidity of the surrounding air.

Cyndaquil is a small, bipedal Pokémon with bluish fur on top of its body, and a milky color on the underside. Cyndaquil seems to be a composite of features from theechidna and the shrew. The echidna features are the flames from its back, while its general body shape is shrew-like. Its eyes are often closed and it has a long, thin snout. It lacks claws on its forelimbs, but has a single claw on each hind foot. Cyndaquil is usually timid by nature and often curls into a ball when intimidated. It has four red spots on its back from which its flames erupt. Cyndaquil is capable of defending itself using these flames. The fire grows more powerful as Cyndaquil becomes more angry or defensive. Though rare in the wild, few can be found living on grasslands.

Totodile resembles a bipedal, blue crocodile with red spines on its back and tail. The spine on its back is larger with additional ridges. Totodile's head is large, with ridges above its eyes. Much of the head's size is composed of Totodile's snout and strong jaws. There are two visible teeth on the tip of its upper jaw, and two rows of three teeth on each side of its lower jaw. On its chest is a yellow, somewhat V-shaped pattern that extends to its arms with a line bisecting the pattern. Totodile has five sharp claws and three toes. Its eyes are red and surrounded by a dark blue or black pattern. Totodile tends to be playful by nature, and has a habit of biting anything it sees, including itsTrainer. In the wild, Totodile prefers to live along the edges of bodies of water.

Totodile resembles a bipedal, blue crocodile with red spines on its back and tail. The spine on its back is larger with additional ridges. Totodile's head is large, with ridges above its eyes. Much of the head's size is composed of Totodile's snout and strong jaws. There are two visible teeth on the tip of its upper jaw, and two rows of three teeth on each side of its lower jaw. On its chest is a yellow, somewhat V-shaped pattern that extends to its arms with a line bisecting the pattern. Totodile has five sharp claws and three toes. Its eyes are red and surrounded by a dark blue or black pattern. Totodile tends to be playful by nature, and has a habit of biting anything it sees, including itsTrainer. In the wild, Totodile prefers to live along the edges of bodies of water.

Torchic is a small, chick Pokémon with stubby, downy, yellow wings. Its body is covered with orange feathers. There is an orange and yellow crest on its head that resembles a flame. Its two thin legs and short beak of are a light brownish yellow, and the feet have three toes in front and one in the back. A male Torchic will have a small black speck on its rear that is not present in females.

Mudkip is a small amphibious quadruped Pokémon. It has a blue body with a light-blue underside. It has a large head with a blue fin on top, and a light-blue tail fin. It has black, beady eyes and orange, star-shaped gills on its cheeks. By using the fin on its head, Mudkip is able to detect changes in air and water currents as well as bodies of water. Its fin can also point in a certain direction, as seen in the anime. Mudkip is capable of moving or crushing boulders larger than itself. Its large tail fin propels it through water with powerful acceleration.

Turtwig is a small, light green, quadruped Pokémon resembling a turtle or tortoise. Its eyes, feet, and lower jaw are yellow. Its body is covered by a brown shell that is composed of earth. The shell has a thick black stripe and a black rim. On a very healthy Turtwig, the shell should feel moist. A small seedling grows on a brown patch on its head. This seedling will wilt if the Pokémon becomes thirsty. As a plant-based Pokémon, Turtwig usually nourishes itself through photosynthesis. It also drinks water, which hardens its soil-based shell. Due to its status as a starter Pokémon, a wild Turtwig is hard to come by and it is generally found under the ownership of Trainers.

Chimchar is a bipedal Pokémon resembling a chimpanzee. Its fur is primarily a shade of orange, though its face, outer ears, underbelly, hands, and feet are light yellow. Its rear has a small, round, red patch that is usually obscured by flames produced by burning gas in its stomach. These flames go out when it goes to sleep, and burn weakly when it feels ill. Its ears are large in comparison to its head size and red inside. It has two pointed teeth in its upper jaw. Chimchar has red markings nearly surrounding its eyes, a swirl-like symbol on its chest, and five fingers on its hands with three toes on its feet. It has a swirly crest of hair on its head. Being very agile, it is able to climb the rocky ledges of tall mountains, where it lives.

Piplup is a light-blue penguin-like Pokémon, which is covered in thick down to insulate against the cold. It has a dark blue head with a primarily white face and a short, yellow beak. The dark blue feathers on its head extend down its back and around its neck, which causes it to appear to be wearing a cape. There are two white ovals on its chest and a small, light-blue marking resembles a crown above its beak. It has flipper-like arms and yellow feet with three toes each.

Snivy is a bipedal, reptilian Pokémon with a slender build. Most of its body is green with a cream underside. A yellow stripe runs down the length of its back and tail, and it has yellow markings around its large eyes. Two curved yellow structures that resemble leaves or small wings protrude from its shoulders and bend backwards. Its slender arms have three fingers, while its tiny feet have no digits whatsoever. It has a large, palmate leaf with three prongs on the end of its tail. This tail is capable of performing photosynthesis, which allows Snivy to move more quickly. However, the tail will begin to droop when Snivy loses energy. This Pokémon has a calm, collected demeanor.

Tepig is a quadruped, pig-like Pokémon that is primarily orange. It has oval eyes, a pink nose, and a thick yellow stripe on its snout. The upper portion of its head is dark brown, and its long, pointed ears are positioned closely together. Tepig has short legs, and its front feet are dark brown. A dark brown band covers its lower back and rear. Its curly tail is tipped with a ruddy pink sphere.

Oshawott is a bipedal sea otter-like Pokémon. It has a spherical white head with small, triangular dark-blue ears on the sides. Oshawott's eyes are dark and its dark orange nose is shaped like a horizontal oval. Several freckles cover its cheeks which may be premature whiskers, and two pointed teeth can be seen when it opens its mouth. The light blue fur on its body forms bubble shapes around its neck. Its arms are white and rounded, while its feet are dark blue with three toes each. It also possesses a rudder-like dark blue tail. It carries a pale yellow seashell called a "scalchop" on its belly. This shell is made of the same material as its claws, and is used for both battle and cracking hard berries.

Chespin is a bipedal, mammalian Pokémon. It has a light brown front with dark brown arms and three triangular markings on its face. There is a tough, green shell covering its back, which extends from its head to halfway down its tail. There is a small, off-center hole in the shell on the back of Chespin's head. The shell can protect Chespin from powerful attacks. Around the face, the shell has four leaf-like spikes, and one split into three parts on the back of its head. These quills are typically soft, but Chespin can stiffen them and use them for attack as well. Chespin's oval eyes are brown, and it has a triangular red nose and rodent-like incisors. Its arms have three fingers, while its feet have two long claws. The visible part of its tapered tail is orange. Despite having a curious nature that tends to get it in trouble, Chespin keeps an optimistic outlook and does not worry about small details

Fennekin is a quadruped, fox-like Pokémon. It is covered in pale yellow fur that is longer on its haunches. Tufts of dark orange fur cover the insides of its large ears, and it has a white muzzle with longer fur on its cheeks. Hot air is vented from its ears, reaching temperatures of over 390 degrees Fahrenheit. It has large, dark orange eyes and a pointed, black nose. When its mouth is open, two pointed teeth can be seen in its upper jaw. Fennekin also has small paws with no visible toes and slim legs. Its tail is fluffy with a dark orange tip. Fennekin chews on twigs instead of eating snacks. It can be temperamental, but it tries to do its best for its Trainer.

Froakie is a quadruped, frog-like Pokémon. It has light blue skin, white hands, and a dark blue stripe from the center of its oval head to its nose. Its eyes, which have yellow sclera, black irises, and white pupils, protrude vertically from its head due to their size. Froakie produces a large mane of bubbles from its chest and back and has two small bubbles on its nose. The delicate yet flexible bubbles, called Frubbles (Japanese: ケロムース Keromousse), reduce the damage Froakie takes from attacks. It has three fingers and two toes on its hands and feet. Despite its carefree attitude, it is vigilant of its surroundings. Froakie is both light and strong, making it capable of jumping incredibly high.