Workshopping a version of Super Smash Bros. if the first installment was on the NES. here's my idea of what the complete roster would have looked like, given the popularity of the games at the time.
Mario and Luigi are a pretty straightforward affair, with their appearances drawing mostly from SMB3.
Samus was a pain to to but I tried to capture her power suit as seen in the original metroid concept art.
Link's design and colors most strongly resemble the first Legend of Zelda design, but his posture was based on Zelda II
Not much to say about kirby. he's not really a fun one to work with.
Designing Little Mac was a blast! I gave him his white colors and took a few creative liberties with his pose.