Who said "Stand up for what you believe in."?

This quote is attributed to Pikachu.

Stand up for what you believe in. - Pikachu

"Stand up for what you believe in."

Pikachu Justice

"Pika pika!"

"Pikachu!"

"Pika pika chu!"

"I choose you!"

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."