Megahammer battling Mario and Yoshi in Super Mario Galaxy 2.
First Game Super Mario Galaxy 2 (2010)
Appearances Super Mario Galaxy 2
Gender None
Homeland Bowser Jr.'s Fearsome Fleet
Location Bowser Jr.'s Fearsome Fleet
Species Robot
Attacks Shooting Bullet Bills, using its hammers.

*Megahammer is one of Bowser Jr.'s robots appearing in Super Mario Galaxy 2. This robot can be found in Bowser Jr.'s Fearsome Fleet, a location at the end of World 3. Bowser Jr.'s pod grows a mask and attaches itself to a robot body. This battle requires use of Yoshi. There are Yoshi eggs spawns around the ring. Megahammer releases Bullet Bills and Banzai Bills.


When Mario starts the battle, he must gather Yoshi who can use his tongue to grab a Bullet Bill that can shoot at Megahammer's blue glass-like orbs to break it as an attack. Afterwards, Yoshi must gather a Bullet Bill with its tongue and shoot it at Megahammer. If not shot on an orb, it won't affect Megahammer. Sling Stars occasionally appear for Mario and Yoshi to shoot at the back of Megahammer instead of walking for a long time to reach the back.

When Mario and Yoshi successfully attack all of Megahammer's blue glass orbs, Megahammer turns its head with glass on it so Mario can use Yoshi to get a Bullet Bill to shoot the glassy part twice to fully defeat Megahammer and to move onto World 4.


Super Mario Galaxy 2 - Second Bowser Jr03:38

Super Mario Galaxy 2 - Second Bowser Jr. Battle (Megahammer)


  • In Bowser Jr.'s Boom Bunker, Megahammer's remains can be seen on the first planetoid.
  • The beta name of Megahammer is "Mighty Mattelloid."
  • The MegaHammer, in attack patterns and the way you damage it, is similar to the Egg King  from Sonic Rush. Both have weapons they can shoot to damage the player (Lasers for Egg King, and Bullet Bills for MegaHammer) and their primary form of attack is by slamming onto the ground with hammer like hands.

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