You aren’t looking for the PAL version. You aren’t looking for the 1.00 or 1.01 NTSC releases. You are looking for the golden standard: .
: It is the only version fully compatible with essential mods like UCF (Universal Controller Fix) 20XX Training Pack Online Play 1.02 ntsc ssbm .iso
Here is the boring (but necessary) legal disclaimer: Downloading a copyrighted .iso from a random website is illegal if you do not own the original disc. However, dumping your own copy of Super Smash Bros. Melee using a homebrewed Wii is legally protected as a backup copy in many jurisdictions. You aren’t looking for the PAL version
The vanilla Super Smash Bros. Melee iso is 1.35GB, whereas the Diet Melee iso is only 239MB. Super Smash Bros. wiki : It is the only version fully compatible
Because the international competitive circuit uses NTSC rulesets, the wins by default.