Arguably better known these days for the WarioWare series, our anti-hero Wario started off as the villain in Super Mario Land 2 before starring in his own series of platformers of which this is the fifth (everyone forgets Virtual Boy Wario Land).
Through strategic use of save-and-restore and a glitch allowing rapid diagonal movement and zipping, Wario gets away with all the loot in this S-Hard mode run by Reseren, which is a difficulty mode that's unlocked after beating the game on Hard mode. S-Hard significantly increases the difficulty in comparison to hard mode, by forcing Wario to start each level with one heart, changing the locations of the chests, as well as reducing the time you have from the frog switches (some levels even changing where you activate them).
Watch a resync of this run being played back on a real console.