Who said "The best battles are against trainers you respect."?

This quote is attributed to Ash Ketchum.

The best battles are against trainers you respect. - Ash Ketchum

"The best battles are against trainers you respect."

Ash Ketchum

"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."