Pic of the day. Here's the settings menu for Rules. Comical pictures appear on the left when you go through the options, so I'll briefly introduce them.
Going clockwise from the top-left corner, here are the pictures that appear for Rules, Time Limit, Custom Fighters, Stage Choice, Damage Ratio, and Handicap.
In the Wii U version, you can customize additional rules from the beginning of the game. Here are the pictures displayed for Stock Time Limit, Team Attack, Pause Function, SD Penalty, Damage Display, and Score Display. You can almost hear Fox's cry in the picture displayed for SD Penalty settings.