Prince Merkimer is the son and nephew of King Lorenzo I and Queen Bunny. He was designated to marry Princess Bean when she impaled Prince Guysbert, his brother, who was up until that point the groom-to-be.
Prince Merkimer is an arrogant nobleman with a large ego. He believed that before he was to marry Bean she would have had an affair with him anyhow, because he believes he is irresistible and obviously superior.
Merkimer was the second Prince of Bentwood to attempt to marry Princess Bean of Dreamland. After his brother Guysbert famously fell on the "Iron Throne" and incapacitated himself, Merkimer was next in line to marry her. Elfo's jealously of Merkimer lead him to encourage Merkimer to drink a magic potion that consisted of pig and elf blood, without knowing what would happen. Unfortunately for him, he turned into a talking pig and is unable to marry Bean. His transformation turns him into a pathetic and lonely character, so much so, he loses his dignity over the mere mention of cabbage.
He once learned that a dragon could shoot fire out of both ends.