As it's no longer a Ghost, Gengar's new form looks more corporeal, and while it maintains its iconic grin, it's also developed pronounced ears, a bat-like nose, and its hands have been traded out ...

Unlike the original Gastly, this one has a more pronounced physical form, with hands, feet, a tail, and the spiky ears that Gengar has. Haunter has become much more like the Gengar fans know and love.