I thought if I really tried enough times, I could catch another Trainer's Pokémon.
Also, I must have tried a thousand times to snatch up May's PokéBall in Emerald. I thought if I did it enough, it would eventually let me take it.
I'm not sure why I thought repetition was key, but somehow, I was convinced that anything would work if you did it enough times. Like telling Birch I didn't want to meet his kid, or telling Brewster I wanted to let my coffee cool.