half races

by any chance in this you can make people be like half saiyan half something else?...like half saiyan half human or something?

The only races that can cross-multiply are races that reproduce through sexual reproduction. Nameks are asexual. Demons can't produce, but can create. You know, that stuff... And if you do cross, you just get the same perks as both races. But, you can only get one set of transformations; the dominant part of your family will give you the dominant trait, which will allow you to have their race's transformations.