User blog comment:Paleomario66/Paleomario66's Q & A/@comment-26907145-20161213164227/@comment-30294856-20161213215957

Some are great (ex: Sonic VS The Flash), but a few are unfair, such as:

-Mario VS Superman (if SMG Mario is used, most incarnations of Superman are doomed)

-Kirby VS Pacman (too much of a kirb-stomp [see what I did there?])