Bull

Bull attacks by charging and by a sonic attack.  Trick him into charging you, but before he hits get out of his way so that he hits one of the anthills.  After a couple of run-ins with the anthills, he'll begin a circular attack which you must jump to avoid.  After the next time he hits a hill, he'll begin to throw rocks at you which you must dodge.  Five run-ins with the anthills and Bull will be no more.