Gastly

Gastly is a Ghost/Poison-type Pokémon introduced in Generation I, famously known as the Gas Pokémon. It is the first stage in a three-part evolution line, evolving into Haunter and then into the iconic Gengar. Gastly is characterized by its spherical, shadowy body, often depicted with two large, white eyes and a wide, mischievous grin. Its body is composed almost entirely of gas, allowing it to float and pass through solid objects. Gastly typically inhabits old, dilapidated buildings, caves, and dark, eerie places, often appearing at night. Its diet consists of life energy, which it absorbs from living beings, often startling them with its eerie presence. In the games and anime, Gastly is frequently portrayed as a playful and sometimes mischievous entity, known for its pranks and ability to induce hallucinations. It plays a significant role in the lore of Lavender Town in the Kanto region and has appeared in numerous episodes, often providing comic relief or a spooky atmosphere. Its unique typing and ghostly nature make it a memorable part of the Pokémon world, representing the mysterious and often unsettling side of nature.