Who said "Ruh-roh! But that's the spirit of mystery solving."?

This quote is attributed to Scooby-Doo.

Ruh-roh! But that's the spirit of mystery solving. - Scooby-Doo

"Ruh-roh! But that's the spirit of mystery solving."

Scooby-Doo Motivation

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

"Ruh-roh!"

"Like, zoinks!"

"Let's split up, gang!"

"I believe in working hard for what you want."

"Never underestimate the power of determination."

"I don't need a reason to fight."

"The most important thing is the mission. Nothing else matters."