Gastly

Spawns on the rooftop at night.

Spawns on the rooftop at night.

Can be found in the alleyways here, usually in pairs.

Found at Megenta Sector 1 at night.

Can spawn on the north Magenta Sector 3 rooftop at night.

You have a rare opportunity to catch a Gastly during the day here.

Roams around the general area at NIGHT.

Lumiose Sewers, Main Access. Two Gastly spawn in this room.

Vert Sector 5 rooftops at night.