8-1

8-1 can refer to the following:
 * World 8-1 from various games
 * Level 8-1 from Mario & Wario
 * Stage 8-1 from Donkey Kong for the Game Boy
 * Bowser's Villa 8-1 from Super Princess Peach
 * Room 8-1 from Mario vs. Donkey Kong 2: March of the Minis
 * Chapter 8-1 from Super Paper Mario
 * Area 8-1 from Mario vs. Donkey Kong: Mini-Land Mayhem!