To achieve the 100 save file in Sonic Generations on the 3DS, follow these steps:
To use a downloaded save file on an actual Nintendo 3DS system, your console must be running custom firmware (CFW) with Luma3DS. You will need a save manager homebrew application like or JKSM . Step 1: Backup Your Current Save
There are several compelling reasons why a player might seek out a 100% save file: