These are characters who appeared very briefly or are only mentioned.
“Princess Eclair is the princess of the Waffle Kingdom, and the lover of the Chestnut King. Luigi...Princess Eclair
“The Mushroom King was Princess Peach's father and king of the Mushroom Kingdom. Never appearing...Mushroom King
“Betsy is a young Flip-Flop girl that appears in Super Paper Mario. She can be found in the first...Betsy
“Mitsy is a very polite girl living on the first floor of Flopside during the events of Super...Mitsy