Distributing or downloading copyrighted WAD files without owning the original game is piracy. This guide is for educational purposes and assumes you own a legitimate copy of Super Mario All-Stars + Super Mario World for SNES or Wii Virtual Console.
So, why is Super Mario All-Stars, specifically the Super Mario World component, still worth playing today? Here are a few reasons: Super Mario All Stars - Super Mario World Wii Wad
Enthusiasts have created "injected" WAD files that package the SNES ROM of Super Mario All-Stars + Super Mario World why is Super Mario All-Stars
Unlike the standard Super Mario All-Stars SNES cart (which only had the first four), the Super Mario World version combines the definitive remakes of the NES trilogy with the native SNES masterpiece. This is the holy grail of 2D Mario. specifically the Super Mario World component