All-Star Battle: Melee
From SmashWiki, the Super Smash Bros. wiki
All-Star Battle: Melee is a single-player event match in Super Smash Bros. for Wii U. The player is allowed to choose any character, and fights against the characters who made a playable debut in Super Smash Bros. Melee, and were not cut since.
Completing the event on normal or hard difficulty awards a Moon Launcher Shell equipment.