8-4

8-4 can refer to the following:
 * World 8-4 from various games
 * Level 8-4 from Mario & Wario
 * Stage 8-4 from Donkey Kong for the Game Boy
 * Bowser's Villa 8-4 from Super Princess Peach
 * Room 8-4 from Mario vs. Donkey Kong 2: March of the Minis
 * Chapter 8-4 from Super Paper Mario
 * Area 8-4 from Mario vs. Donkey Kong: Mini-Land Mayhem!
 * 8-4 Remix (Castle Labyrinth), a sample course in Super Mario Maker