The most important rule of emulation is to only use game files you have legally obtained. The best method is to you own. You can do this using the steps above. For the initial ISO creation from a disc, you'll need a PC with a DVD drive and a program like CleanRip .
If a website claims to have squeezed a 4 GB game like Super Smash Bros into a 10 MB download, it is a scam. While scrubbing data reduces file sizes significantly, there are mathematical limits to compression. A file that is impossibly small will either be corrupted or contain a virus. Wii Games Highly Compressed Android