Rinto is a Pokémon Trainer that likes to give out advice to his opponents. He watched the battle between
Ash Ketchum and
Dozer at the Rock Tunnel in the Kanto region. He thought
Ash's Farfetch'd had plenty of power, but it lacked discipline.
He challenged
Ash's Farfetch'd to a battle right after it had defeated
Dozer's Gurdurr and his Gallade knocked it out with one attack.
Rinto thought
Ash's Farfetch'd had an awful lot of hidden potential deep inside but it hadn't found it during that battle.
Ash Ketchum decided to train harder to be in sync with Farfetch'd so that they'd win the next time they faced
Rinto.