Who said "A real Pokémon trainer never gives up!"?

This quote is attributed to Ash Ketchum.

A real Pokémon trainer never gives up! - Ash Ketchum

"A real Pokémon trainer never gives up!"

Ash Ketchum Perseverance

"Gotta catch 'em all!"

"I'm gonna be a Pokémon Master!"

"There's no such thing as a useless Pokémon. It's the trainer that makes the difference."

"The important thing is not how strong a Pokémon is, but the bond between a trainer and their Pokémon."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."