Fushigi no Dungeon - Fuurai no Shiren GB - Tsukikage Mura no Kaibutsu, translated as Mystery Dungeon - Shiren the Wanderer - The Monsters of Moonlight Village, is an entry in the Mystery Dungeon series of roguelike games. The game follows Shiren The Wanderer, and his talking weasel Koppa.

Rather than go on an adventure with Shiren, CasualPokePlayer instead abuses input handling programming errors to execute arbitrary code, showing off the popular "Bad Apple!!" music video in the game itself.

This video includes the song "Bad Apple!!" from Touhou Gensoukyou ~ Lotus Land Story (東方幻想郷 ~ Lotus Land Story). The song was originally composed by ZUN then arranged by Masayoshi Minoshima (Alstroemeria Records). It was sung by nomico with lyrics from Haruka. The music video shown was created by あにら (Anira).

If you've enjoyed what you've watched, you can view the original music video on YouTube and purchase the 10th Anniversary Album from Alstroemeria Records vendors.