Four Swords Adventures
From SmashWiki, the Super Smash Bros. wiki
Four Swords Adventures is a single-player event match in Super Smash Bros. for Wii U unlocked by completing the previous event, The Original Heavyweights. In it, the player controls Toon Link, and must defeat three other Toon Links in a stamina match.
This event is unlocked by clearing The Original Heavyweights. Completing the event unlocks the up path.
Completing the event on normal or hard difficulty within 45 seconds awards a Steel Sword equipment.