Who said "A leader isn't born; they're forged through struggle."?

This quote is attributed to Team Rocket.

A leader isn't born; they're forged through struggle. - Team Rocket

"A leader isn't born; they're forged through struggle."

Team Rocket Leadership

"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!"

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"