to take up only a few hundred megabytes instead of gigabytes. Key Elements of the "Extra Quality" Scene: WBFS Format
It sounds like you're referring to a download source or pack titled — likely a collection of Wii games in WBFS format, Spanish language, advertised as "extra quality." Roms Wii Wbfs Espanol Extra Quality
A ROM should never be an executable file. If a site asks you to run a program to get your game, close it immediately. Check the Extension: Your file should end in .wbfs or .iso . to take up only a few hundred megabytes instead of gigabytes