Board Thread:Breeding Questions/@comment-16584687-20130905120303/@comment-10090661-20130905162350

The Poo is about as hard to get as the Legend. Maybe harder, because there is a condition attached called "Stage 3" which I think refers to the selection process in the Breeding Engine. I suspect that Stage 3 is unlocked if a wildcard is used in breeding.

i.e., Breed a Terra/Sea/Dark Hybrid with a Legend Dragon.

But you probably won't be able to get the Poo with the first try, unless you are seriously lucky. It will probably take you something like 30 tries. Maybe more. Maybe less. It's just luck. :)