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In The Super Mario Bros. Super Show! episode "Love 'Em and Leave 'Em" Hildy is employed by Queen Rotunda to create for her a love potion that would make the handsome Prince Pompadour fall in love with her. Setting to work, Hildy creates the Passion Potion, a powerful love potion which can make its drinker instantly fall in love with the first person they see.
Later, after Queen Rotunda is informed by one of her Beezo minions that she has prisoners, Hildy gives her some of the Passion Potion, in case she runs into Prince Pompadour while going to see her recently captured prisoners.
Hildy is later seen at the wedding of Mario and Queen Rotunda, who, through an accident, has ingested some Passion Potion and become madly in love with Mario.
Eventually, after Queen Rotunda and Prince Pompadour, one of the attendees of the wedding, drink some Passion Potion that Luigi sneaks to them and fall in love with one another, Hildy decides to make a toast to Queen Rotunda for not marrying Mario. However, Hildy drinks some wedding punch that had a large amount of Passion Potion accidentally dropped in it by Luigi, causing her to fall in love with the first person she sees after ingesting it, Luigi himself. He, as well as Mario, Princess Toadstool and Toad are chased by her all the way out of Rotunda Land.