Chikorita

Chikorita is one of the sweetest, calmest, and most affectionate Pokémon in the Pokémon universe. Its most common personality traits are:
Affable and loyal: It is extremely loyal to its trainer. Once it forms a bond, it becomes very protective and affectionate (although its way of showing it is subtle, not effusive like some other Pokémon).
Calm and observant: It is not hyperactive. It prefers to calmly observe its surroundings. Its leaf serves as a natural "sensor": it moves it to measure the temperature and humidity, showing that it is a Pokémon very connected to nature.
A little proud: In the games and anime, it can sometimes be stubborn or "jealous" when it feels it's not the center of attention (especially in the series with Ash's Chikorita). It can act a bit like a diva if another Pokémon steals the spotlight.
Gentle and peaceful: It is not aggressive by nature. It prefers to resolve situations calmly or by using its leaf to create aromatherapy or sweet scent. It is ideal for beginner trainers or calm individuals.
Gently curious and playful: He loves exploring nature, sunbathing and, as seen in your picture, enjoying tasty treats (especially sweets or fresh food).

It's a quadruped Pokémon

Appearance
Chikorita is a small, quadrupedal Pokémon that resembles a baby sauropod dinosaur or a small reptile. Its most notable characteristics are:
Body: Light green in color (almost mint or lime), rounded and plump, with a smooth and shiny texture that gives it a very tender and "soft" appearance.
Head: Large in proportion to the body, with enormous, very expressive ruby-red eyes with black pupils and a characteristic shine. It has a small mouth that often displays a sweet smile.
Leaf: Its most iconic feature is a large green leaf that grows from the top of its head, resembling a ponytail or a hat. This leaf is flexible and it uses it constantly (to sense the wind, temperature, or humidity).
Neck and back: It has a series of small green bumps or "buds" (usually three or four) along the neck and upper back, reminiscent of seeds or small plant shoots.
Limbs: Short legs with white claws. It walks on all fours, although in many illustrations it is seen sitting or standing, as in the image you shared.
Tail: Short and ends in a point.