The Hyrule Jump refers to the act of crossing the open space from Hyrule Temple's upper right ledge to its bottom-most platform. Every character can perform the Hyrule Jump, though it is considerably difficult for characters with short recoveries, in particular Falco. This not a professional gameplay technique, in part because Hyrule Temple is a stage banned from competitive tournament play, so it is more of a just-for-fun maneuver than anything else. In single-player-mode matches, the Hyrule Jump may be useful in disorienting CPU opponents because they must travel a long distance to get to your new position.
Reverse Hyrule Jump
The Reverse Hyrule Jump is the act of performing the Hyrule Jump in reverse, or jumping from the bottom-most platform to the right-most ledge. Jigglypuff and Mewtwo are known to be able to do the Reverse Hyrule Jump. Link and Young Link are technically able to perform the Reverse Hyrule Jump as well, by using their down B bombs to damage themselves to the point where the bomb's knockback can carry them most of the way to the upper ledge. Like the Hyrule Jump, this is more of a show-off technique for fun than a true gameplay maneuver, though in single-player-mode matches it may help in disorienting CPU opponents because they must travel a long distance to get back to your new position.