Due to our lack of using any "404" jokes in the episode itself, it's in the title instead.

COVERED IN THIS EPISODE: Lazarus 8, Bleach: Thousand-Year Blood War 2, Blue Exorcist 27, One Piece 727-728, Yu Yu Hakusho 56, Kowloon Generic Romance 1, The Brilliant Healer's New Life in the Shadows 1, My Hero Academia: Vigilantes 1, and The Unaware Atelier Meister 1.