Who said "Motivation is 90% desperation and 10% boss yelling."?

This quote is attributed to Team Rocket.

Motivation is 90% desperation and 10% boss yelling. - Team Rocket

"Motivation is 90% desperation and 10% boss yelling."

Team Rocket Motivation

"Prepare for trouble, and make it double!"

"To protect the world from devastation!"

"To unite all peoples within our nation!"

"To denounce the evils of truth and love!"

"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."