Count Pump

Count Pumpka is a character of the day who appeared in A Festival Trade! A Festival Farewell?.

During the Gourgeist Festival, Count Pumpka was looking at participants from his castle. He spotted Team Rocket and was impressed by Jessie's Pumpkaboo. When he showed her to his own Pumpkaboo, he fell in love with her immediately. Because of this, Count Pumpka had his steward invite Team Rocket for a meal at his castle. He introduced himself to the trio and told them he wanted Jessie's Pumpkaboo. Jessie saw a chance in this to swindle the count, and told him that her Pumpkaboo had been threatened by Ash's Pikachu. If Count Pumpka would be able to get Pikachu for them, Jessie would consider trading her Pumpkaboo to him. As such, he sent his steward after Ash and his friends.

Ash and his friends ultimately burst into Count Pumpka's castle. Still thinking they were bad people, the count had his steward imprison them. Following this, the count proposed Jessie to trade her Pumpkaboo to him now. When she claimed she didn't want to trade it away, Count Pumpka offered her his Mawile. Jessie was still unwilling to make the trade, until Count Pumpka informed Jessie that Mawile were able to Mega Evolve, which got Jessie imagining her Mega Evolving Mawile, and ultimately agreeing to the trade. After the trade, Pumpkaboo evolved into Gourgeist. The count's own Pumpkaboo suddenly lost all interest in her, and Jessie regretted the trade as she remembered the good times she had had with Pumpkaboo. She demanded that they reverse the trade, and as Prince Pumpkaboo no longer had any interest in Gourgeist, Count Pumpka agreed. During all this, Ash and his friends managed to escape. They revealed to the count and his steward that Team Rocket were the bad people instead. After they managed to blast Team Rocket off, Count Pumpka and his steward apologized to them for the misunderstanding and for mistreating them. To make it up to them, he invited them for dinner as they watched the fireworks of the Gourgeist Festival.

(Source: Bulbapedia)