Who said "We never give in, no matter how tough it gets."?

This quote is attributed to Scooby-Doo.

We never give in, no matter how tough it gets. - Scooby-Doo

"We never give in, no matter how tough it gets."

Scooby-Doo Courage

"Scooby-Dooby-Doo, where are you?"

"Ruh-roh!"

"Like, zoinks!"

"Let's split up, gang!"

"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."