Pumpkaboo evolves into Gourgeist when traded and has four size-based forms, Small, Medium, Large, and Jumbo Variety, which also differ in the spirits they prefer to carry. It stirs around sundown and guides lost spirits to the afterlife by holding them inside, even though it began as a pumpkin possessed by a spirit stuck in this world.
Pumpkaboo debuted in The Bamboozling Forest, where Jessie tripped over and caught a Super Size Pumpkaboo. It evolved into Gourgeist in A Festival Trade! A Festival Farewell?, after a trade was arranged with Count Pumpka's Small Size Pumpkaboo, Prince Pumpkaboo, who then rejected her once she evolved.
Pumpkaboo's first card appeared in the XY base set, illustrated by 5ban Graphics, followed by two XY Trainer Kit printings and a Phantom Forces card by HiRON. Crimson Invasion and Evolving Skies continued the line, and Paradox Rift and the Mega Evolution era's Chaos Rising set added further Common printings, the latter by Jerky.
Pumpkaboo's first card, a 2014 XY Common illustrated by 5ban Graphics
An Evolving Skies Common illustrated by Yuka Morii
A Chaos Rising Common illustrated by Jerky
Pumpkaboo evolves into Gourgeist when traded.
She caught a Super Size Pumpkaboo in The Bamboozling Forest, and it later evolved into Gourgeist after a trade with Count Pumpka's Prince Pumpkaboo.
Yes, it has four size-based forms called Small, Medium, Large, and Jumbo Variety.

バケッチャ
Ghost · Grass
Pumpkaboo is the Pumpkin Pokémon, a Ghost/Grass type that carries wandering spirits to the afterlife and evolves into Gourgeist when traded. Jessie caught a Super Size Pumpkaboo in The Bamboozling Forest, and it evolved into Gourgeist after a trade with Count Pumpka's Prince Pumpkaboo.
PumpkabooGourgeist
No published index yet — too few of Pumpkaboo’s cards trade often enough to strike one.