Sharing links to game ISOs is illegal under copyright law. The only legal way to obtain one is to rip it from your own physical disc:
Homebrew and mod loader (legal if you own the game) super smash bros brawl iso for project m top
Let’s address the elephant in the room. To play Project M, you need a rip of the original game. If you still have your old Brawl disc gathering dust, you can rip it yourself using a homebrewed Wii—a process that is legal and preserves your own copy. Sharing links to game ISOs is illegal under copyright law