I was hoping that I could breed a Cablion since they are like awesome. I also have two Ditto and I wanted to breed my Cablion.
No, you cannot. Cobalion, like all Legendaries (except Manaphy), are part of the Undiscovered Egg Group, which mean they can't breed.
Sadly any legendary like (you spelled cobalion wrong) cobalion will not breed (with the exception of manaphy which somehow breeds into phione) along with any other legendary which will not breed so its a one shot chance to get one. (and no legendarys wont breed with legendarys since most dont have genders)