Dr. Quincy T. Quackenpoker (Japanese: ミドリカワ Midorikawa) is a character of the day in the Pokémon anime who appeared in The Wacky Watcher!. Dr. Quackenpoker is a Pokémon watcher, and, in the dub, one of Tracey's idols. Tracey got the chance to meet the watcher while traveling with Ash and Misty in the Orange Islands. When they met him, he was studying Magikarp on Rind Island. Tracey and the doctor quickly became friends. In fact, Tracey even helped him count how many Magikarp had evolved into Gyarados during their evolution season. Together, they discovered that more Magikarp had evolved while they were studying them than any other previous year.
- Dr. Quackenpoker, at least in the English dub, is based on comedian Groucho Marx of the Marx Brothers, and particularly his character Dr. Hakenbush from A Day at the Races. Not only are his voice and appearance very similar but he also uses several of the same jokes. For example, the line, "When I was a boy, I woke up one morning and I saw a Magikarp in my pajamas. How a Magikarp got in my pajamas I'll never know," is adapted from Groucho's remark, "Did I ever tell you how I shot a wild elephant in my pajamas? How he got into my pajamas I'll never know."
- Also, Dr. Hakenbush was originally going to be called "Dr. Quackenbush". Dr. Quackenpoker may be a reference to this.
- His Japanese name translates to green river.