Who said "I've learned to face my doubts and conquer them."?

This quote is attributed to Donkey Kong.

I've learned to face my doubts and conquer them. - Donkey Kong

"I've learned to face my doubts and conquer them."

Donkey Kong Courage

"Tie your shoes!"

"I'm so excited I could burst!"

"Let's-a-go!"

"You're my best friend!"

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."