Who said "Ruh-roh! But that's what makes life interesting."?

This quote is attributed to Scooby-Doo.

Ruh-roh! But that's what makes life interesting. - Scooby-Doo

"Ruh-roh! But that's what makes life interesting."

Scooby-Doo Life

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

"Ruh-roh!"

"Like, zoinks!"

"Let's split up, gang!"

"Life is meant to be lived with passion."

"Life is what happens when you're busy making other plans."

"Life is a journey, not a destination."

"Life's too short for regrets."