"The year is 20XX. Everyone plays Fox at TAS levels of perfection. Because of this, the winner of a match depends solely on port priority. The RPS metagame has evolved to ridiculous levels due to it being the only remaining factor to decide matches." The 20XX Melee Training Pack Hack is a mod built on SSBM v1.02-U providing numerous features including a custom debug menu and visualizations to help you see, understand, practice, and hopefully master Melee mechanics.