I tried to name my pet/animal, but it wouldn't let me click on the "Continue Hatching" button. How do you fix this?

Names on Rescreatu are unique, meaning that there can generally only be one of each name on site. If the box flashes red, it means that the name you're trying is already taken. When it turns green, it means it's clear and you should be able to finish hatching without a problem :)