>>14584191When you encounter the Pumpkaboo in the wild, it will be one of four possible sizes: Small, Average, Large and Super Size, with Super Size being the rarest. The difference is actually in their stats. While as a Pumpkaboo, its Hit Points go up, the larger it is, but the Speed decreases wheres when it has been traded to evolve into a Gourgeist, its Attack stat also starts getting larger for the larger forms while Speed decreases.
