Jessie's Pumpkaboo is a ghost/grass-type Pokemon and the first Pokémon Jessie from Team Rocket obtained in the Kalos region.
Pumpkaboo appeared in XY011: The Bamboozling Forest! while Team Rocket was lost where it appeared out of the ground after Jessie tripped over its horns. Jessie immediately threw a Poké Ball at it and caught it easily in one go.
Not much is known about Pumpkaboo, but it has a habit of flashing the lights in its stomach. It also shows that it has no problem listening to Jessie's commands.