- Voice actor: Ed Paul (both English and Japanese)
Gengar is dark purple in color and roundish in shape. Gengar's hands now connect to the rest of its body and it has a pair of legs and a short, pointed tail. Gengar's eyes are now red, its back has a spiny appearance, and its mouth is usually curled into a sinister grin. Its height is 4'11" and weight is 89.3 lbs.
As Mega Gengar, a portion of its body sinks into the ground. The lower portions turn a more reddish purple, and a third eye appears on its forehead. This new unblinking eye is oval and yellow and allows it to see into other dimensions. The spikes on Mega Gengar's back are more numerous and pointed. Additionally, spikes appear on its hands and tail. Its ears are now considerably longer and project backward. Its height becomes 4'07", while its weight remains the same as Mega Gengar.
Gengar have the ability to hide perfectly in the shadow of any object, granting it exceptional stealth. However, Gengar's body acts as a heat sink; its presence cools the temperature of the surrounding area by nearly 10°F, because it took the warmth. In addition, Gengar possesses the ability to fly through the air, as demonstrated by Morty's Gengar. Since Gengar is a fully evolved Pokémon, it can use Hyper Beam and Giga Impact.
Gengar are very mischievous, and at times, malicious. They enjoy playing practical jokes, such as pretending to be one's shadow, then behaving erratically. When the quarry notices, the Gengar takes delight in its victim's terror. However, Gengar have been known to be loyal to Trainers that treat them well; the smile is less mischievous and friendlier in this case. Gengar may also cast curses.
Gengar live in shadows of rooms, caves, and dark places where shadows form, especially in urban areas such as cities and back alleys but only during the night. Gengar are also known to live in mountains. It normally shares its range with Gastly and Haunter, but reports of wild Gengar are not unheard of.
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Ash, Tom, and Sonic first saw a Gengar in person in Lavender Town in The Tower of Terror while searching for a Ghost Pokémon to fight Sabrina with. Due to a close call, Ash got to spend some unexpected time with the ghostly trio, Gastly, Haunter, and Gengar. It, along with Haunter, seemed to have a fondness for Japanese stand-up, and attempt to (unsuccessfully) amuse Ash, tom, or Sonic by acting as a pair of performers. It reappeared in a flashback in the following episode.
Gengar was the leader of "Team Meanies" in Pokémon Mystery Dungeon: Team Go-Getters out of the Gate!.
Drake of the Orange Islands used a Gengar in his battle with Ash in Hello, Pummelo! and Enter The Dragonite. His Gengar managed to confuse Ash's Tauros before he returned it and instead tried with Ash's Lapras. In the collision between Night Shade and Ice Beam, both Lapras and Gengar fainted.
A group of Gengar, along with a group of Haunter, was creating illusions within a forest in Illusion Confusion!.
A Gengar appeared in One Team, Two Team, Red Team, Blue Team!.
A Gengar under the ownership of Hearthome City's Gym Leader Fantina appeared in a flashback in Playing the Leveling Field!, and appeared in A Shield with a Twist where it was defeated by Ash's Buizel.
A Gengar is set to apeear in Celebrating the Hero's Comet!.
Gengar, Shadow Pokémon. The evolved form of Haunter and the final evolved form of Gastly. It can absorb any surrounding heat, therefore if a Gengar is nearby, it is said to feel ten degrees colder than normal, leaving a sudden chill. Gengar hides in the shadows.