World 6 (New Super Mario Bros.)

World 6 is a world in the game New Super Mario Bros. This world is made up of rocky canyons and mountain-like terrain. This world introduces new enemies such as Fire Bars, and is the only world in the entire game to feature Chain Chomps. This is the only world apart from World 8 to have two Towers. The boss of this world is Monty Tank.

Returning Enemies

 * Bill Blaster
 * Bob-omb
 * Bullet Bill
 * Cheep-Cheep
 * Dry Bones
 * Super Dry Bones
 * Goomba
 * Koopa Troopa
 * Koopa Paratroopa
 * Lakitu
 * Moneybag
 * Piranha Plant
 * Podoboo
 * Super Piranha Plant
 * Spike Tops
 * Spiked Pillar
 * Spiny
 * Tweester
 * Venus Fire Trap
 * Bowser Jr. (mini-boss)

Enemies introduced

 * Deep-Cheep
 * Chain Chomp
 * Mega Deep-Cheep
 * Firebar
 * Monty Tank (boss)

Trivia

 * World 6 is one of two worlds in the game that has two Towers. Similarly, the mountain-themed Rock-Candy Mines in New Super Mario Bros. U - which also happens to be the sixth world in said game - is the only one with two Towers in that game.