Who said "Believe in yourself and others will too"?

This quote is attributed to Pikachu.

Believe in yourself and others will too - Pikachu

"Believe in yourself and others will too"

Pikachu Motivation

"Pika pika!"

"Pikachu!"

"Pika pika chu!"

"I choose you!"

"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."