The Final Fantasy Legend, also known as Makai Toushi SaGa in Japan, is a Game Boy RPG. It is the first entry in the long running SaGa series and has a lot of strange and esoteric mechanics. You can form a team of up to four party members consisting of humans, mutants, and monsters. Each character type get stronger by wildly different means.
Darkman425 completes the game in record time by getting the 4 spheres and defeating Ashura and the Creator. Please read the author's comments for more details.
We also have a movie that uses a warp glitch that skips the vast majority of the game.
You can watch this movie being played back on real console here.