Earthbound's Onett and Fourside

Earthbound's Onett and Fourside (subtitled Onett and Fourside) is the 10th episode of Smash History on The Game Theorists.

Description
''Earthbound. A Nintendo classic given second life via an appearance by Ness in the very first game for the series. But how has the Earthbound series contributed to the Super Smash franchise? Today, Drake takes a look at the two stages Earthbound has contributed to Smash, Onett and Fourside. And you might be surprised by what details exist in the background of these levels...''