Gengar is a dual-type Ghost/Poison Pokémon). It was introduced in Generation I and evolves from Haunter when traded or when exposed to a). Gengar is known for its mischievous and sometimes malicious behavior, such as playing practical jokes and casting curses). It is rarely found in the wild, but can be found in caves and dark places where shadows form).

Here is a summary of Gengars type, strengths, and weaknesses:

• Type: Ghost/Poison)
• Strengths: Gengar is strong against Grass, Fighting, Poison, and Fairy-type Pokémon.
• Weaknesses: Gengar is weak against Ghost, Dark, Psychic, and Ground-type Pokémon.

In summary, Gengar is a dual-type Ghost/Poison Pokémon that is strong against Grass, Fighting, Poison, and Fairy-type Pokémon, and weak against Ghost, Dark, Psychic, and Ground-type Pokémon.