Its all about them pokeballs. I have never used dusk ball or master ball. The only time I had to use other balls besides pokeballs was when I was catching Politoad, he kept using perish song I was scared cause he is freaken rare and I had seen him only once. I failed catching him. Fortunately I encountered him again and I used quick ball. I caught him. So If I had used dusk ball at night I prabably would have failed. If I used a master ball I lost a priceless ball. So I think quick ball is better. It saved my masterball and I was going to use it.