第 1 集: 小丑瞄準水晶骷髏頭鑰匙，一名神秘少年緊隨其後
2016年4月4日 播出
The mysterious organization Devil's Fang is unearthing the Crystal Skull Key from an ancient ruin in order to lure out Joker, when a mysterious shadow wreathed in flames emerges from a nearby stone coffin. Joker infiltrates Mr. Kaneari's Golden Museum in order to take the Crystal Skull Key as his 999th treasure, where he meets a boy named Akai Tsubasa, who seems to want to follow Joker around. Can they break through a gauntlet of perilous traps to get the key? And who is Akai Tsubasa, really? (Source: Crunchyroll)