I need some help...

I so far understand the basic idea that breeding lessers, mojaves, het russos, butters, phantoms, mochas to each other gives you a 25% chance of a BEL. And do ALL of these when bred to another of their own always have the same chance of making a BEL too?

What are specials, and mystics? How do they work? What do they look like?

Where did the lesser platinum come from? I remember reading it came from platinums or something...? Or does it just resemble them?

What is it I hear about phantoms and mystics being the same thing?

Are there any other BEL-making mutations I have missed?
All help appreciated!