User blog comment:Zeref Fullbuster/Rivals and other characters/@comment-4980287-20150131002307/@comment-1607934-20150131025637

Well, it's unknown how he will get his Sylveon but maybe it will be the evolved form of his female Eevee or it will be the evolved form of a different Eevee that he caught it off-screen in the later BW series or in the early XY series.