2-4

2-4 can refer to the following:
 * World 2-4 from various games
 * Level 2-4 from various games
 * Stage 2-4 from Donkey Kong for the Game Boy
 * Hoo's Wood 2-4 from Super Princess Peach
 * Room 2-4 from the Mario vs. Donkey Kong series
 * Chapter 2-4 from Super Paper Mario
 * Area 2-4 from Mario vs. Donkey Kong: Mini-Land Mayhem!

2-4