Kong Fu (character)
From the Super Mario Wiki
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Kong Fu's first and only appearance was in the episode "Kong Fu". Here he was hired by King K. Rool and the lizards to beat Donkey Kong in the annual Donkey Kong Challenge – a contest to see if anyone could defeat Donkey Kong in three challenges and become the new ruler of Kongo Bongo Island.
Though Kong Fu managed to beat Donkey Kong in the Mind challenge, Kong Fu lost the Heart challenge to Donkey Kong; it seems Kong Fu was afraid of the dark and while Kong Fu was panicking during a solar eclipse Donkey Kong refused to hit him, showing true virtue and winning the Annual Donkey Kong Challenge.