Nice Guy Potion

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Bowser being sprayed with some Nice Guy Potion

Nice Guy Potion is a concoction created by Kooky von Koopa, which forces anyone who inhales it to act and behave like a kind, sensitive person, even if the being it is used on is naturally mean and spiteful.

Nice Guy Potion is used only in The Adventures of Super Mario Bros. 3 episode "Princess Toadstool for President". After overhearing how his father could not act nicely enough in order to win the votes of the Mushroom People in an election against Princess Toadstool, Kooky sprays Bowser with a dose of Nice Guy Potion, which makes him act like a nice guy for a undetermined amount of time.

The potion eventually wears off and Bowser returns to being his selfish old self. Kooky and Cheatsy Koopa begin to prepare another batch of Nice Guy Potion for Bowser's final debate, but Mario disposes of it while Luigi distracted the Koopalings. With no potion forcing him to be nice, Bowser blows his chance at winning the election by accidentally scaring the Mushroom People. As a result, the only vote he receives is his own.

Names in other languages[edit]

Language Name Meaning
Italian Pozione del Bravo Ragazzo Nice Guy Potion
Romanian Loțiune de drăgălășenie
Licoare de drăgălășenie
Niceness lotion
Niceness potion
Spanish Pocion de hombre bueno Nice Guy Potion


  • The Nice Guy Potion is blue when Kooky sprays it in Bowser's face, but when Kooky and Cheatsy prepare the potion in the lab, it is purple.