Boss Blitz

Boss Blitz, or , is the final course of World Flower in Super Mario 3D World. Being given only 500 seconds in total, the player must rematch the bosses King Ka-thunk, Pom Pom, King and Queen Hisstocrat, Boss Brolder, Boom Boom, and Motley Bossblob. It is unlocked via completion of Spiky Spike Bridge Sneak. Beating this level will unlock the rocket to World Crown if the player has collected all of the Green Stars, Stamps, and Gold flags in the game, excluding those of World Crown. This is the only level in both World Mushroom and World Flower that is not remade from an existing level. When the player gets close to the level via the overworld, Bowser's laugh can be faintly heard.

In Super Mario Galaxy 2, a galaxy of the same name is alike to this level as it pits Mario against past enemies. The only difference is that Boss Blitz has the player battle bosses from the same game, while Boss Blitz Galaxy instead features bosses from its respective game's predecessor, Super Mario Galaxy.

Layout
The course begins on a grassy platform with five Warp Boxes and one locked Warp Box. Each Warp Box leads to a boss fight, with a Key Coin awarded if the boss is defeated. The bottom left box leads to King Ka-thunk, the top left leads to Pom Pom, the top right leads to Boss Brolder, the bottom right leads to Boom Boom, and the center box leads to Hisstocrat and Queen Hisstocrat. All boss battles are fought in the same manner as they originally are, with the exception of Hisstocrat and Queen Hisstocrat, as they are fought at the same time, and Motley Bossblob, who uses his strategy from the second battle rather than the first, but his shockwaves are further and faster. After all the Key Coins are collected, the unlocked Warp Box leads to the sixth and final boss fight of the level: Motley Bossblob. Upon his defeat, a Warp Box appears, leading to the Goal Pole.

Green Stars

 * Green Star 1: Appears after Boss Brolder is defeated.
 * Green Star 2: Appears after King and Queen Hisstocrat are defeated.
 * Green Star 3: Appears after Motley Bossblob is defeated.

Enemies

 * King Ka-thunk (boss)
 * Boom Boom (boss)
 * Pom Pom (boss)
 * Boss Brolder (boss)
 * Brolders
 * Hisstocrat (boss)
 * Queen Hisstocrat (boss)
 * Motley Bossblob (boss)

Names in other languages
Bosse im fliegenden Wechsel