Mega Goomba (boss)

Mega Goomba is the boss of World 4 in New Super Mario Bros.

Before the battle, a regular Goomba gains access to a Mega Mushroom and becomes Mega Goomba. Mario must defeat this boss to acquire the key that provides access to World 5.

To defeat Mega Goomba, Mario must activate a switch, causing two platforms to appear. When Mario stands on the platform, it will elevate in the air. From there, Mario can either Wall Jump, or Jump directly on top of the Mega Goomba. For the attack to be successful, Mario must Ground Pound the Goomba (unless he is Mega Mario).

Once Mario hits the Mega Goomba three times, the Goomba will die, and Mario can get the key to World 5.

Trivia
This Goomba originated in the very first previews of New SMB or as it was called back then, Super Mario Bros. DS in which it was a normal level enemy Goomba until it was caught in contact with a Super Mushroom which made him the same size as he was in the current game. This new and innovative feature was taken out for unknown reasons. Possibly due to the game being extremely hard if certain enemies turned mega.