GAYSUK

GAYSUK is a common code for video games on the Game Genie.

Super Mario Bros

 * Mario's gravity is delayed when walking off an edge, but standing jumps are affected.

Another game to have this effect of delaying gravity, but as an integral part of the game toward the end, was The Legend Of Zelda: Ocarina Of Time, with its hover boots feature. Oddly enough, no Game Genie devices were developed for the Nintendo 64, which Ocarina of Time was on.

Super Mario Bros. 3

 * Question marks still animate after being activated, coins don't disappear, etc.