Who said "Hot dog! That's the spirit of never giving up!"?

This quote is attributed to Mickey Mouse.

Hot dog! That's the spirit of never giving up! - Mickey Mouse

"Hot dog! That's the spirit of never giving up!"

Mickey Mouse Perseverance

"Hot dog!"

"Oh boy!"

"Gosh!"

"That's swell!"

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."