User blog comment:ERBofSmoshery/Smash Raps Announcement/@comment-25144949-20150810190725

Yoshi vs Godzilla (small, heroic dinosaur vs large, villainous dinosaur)

Diddy Kong vs King Kong (small Kong vs big Kong) or Donkey & Diddy vs King Kong (battle of Kongs)

Bowser & Bowser Jr. vs Kim Jong-il & Kim Jong-un (father/son leaders who are known for their "ruthlessness" to their people)

Sonic vs Usain Bolt (fast runners)

Duck Hunt vs Sylvester & Tweety Bird (dog & bird duo vs cat & bird duo)

Link vs King Arthur (obvious connection)

Samus vs Darth Vader (suited-up sci-fi hero vs suited-up sci-fi villain)

Little Mac vs Mike Tyson (boxers)

Mega Man vs Iron Man (armor-clad heroes with "Man" in their name)