Najimi Ajimu (Medaka Box) vs High Evolutionary (616).
Standard arena match, best versions (not necessarily the most current versions) for both.
Edit:
If "best versions" make this a stomp because of some odd story where High Ev got ahold of, say, a dozen cosmic cubes (or something), lets make it "standard versions."
Sorry, my bad. Answer for either or both, as you prefer.