Who said "My Pokémon believe in me, so I won't let them down."?

This quote is attributed to Ash Ketchum.

My Pokémon believe in me, so I won't let them down. - Ash Ketchum

"My Pokémon believe in me, so I won't let them down."

Ash Ketchum Motivation

"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."

"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."