Who said "Scooby-Doo, where are you? The adventure awaits!"?

This quote is attributed to Scooby-Doo.

Scooby-Doo, where are you? The adventure awaits! - Scooby-Doo

"Scooby-Doo, where are you? The adventure awaits!"

Scooby-Doo Adventure

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

"Ruh-roh!"

"Like, zoinks!"

"Let's split up, gang!"

"The greatest adventure is life itself."

"The adventure of life begins with a single step."

"Adventure finds you when you stop running."

"Fortune and glory, kid."