Ok. I am pretty sure that we have this problem. You are hunting a legendary but all the reloading and changing pages are tiring your fingers. After a few hours, still nothing. A day, nothing. And you gave up. So here is a suggestion. How about we have incenses that increase the chance of getting a family of Pokémon. Or repels that can decrease the chance of getting a Pokémon of the unwanted family. For example, a repel that can lower the chance of getting eggs and an increase that can increase the chance of getting eggs.