When you want to capture a Pokémon, you have to weaken it first. This is common knowledge among trainers. If not it can easily break free or the ball can even bounce off. Status changes may also help. In Sinnoh we learn that this is because the Pokéball abuses the Pokémons natural instinct to cower when weak. But then there is of course the question: Why can´t we capture it when it is defeated? It can´t be because it can´t "cower" anymore, since some unweakened or to a solid block of ice frozen Pokémon can still be captured. Defeated Pokémon also don´t dissapear, do they. Trainer-Pokémon at least don´t. so what is the reason for that? I would love to see your ideas and suggestions. Start the discussions!