First Game Super Mario Galaxy (2007)
Location Bowser Jr.'s Robot Reactor
Attacks Bullet Bills

Megaleg is a giant robot in Bowser Jr.'s Robot Reactor in Super Mario Galaxy. The game's second Grand Star is located in a chamber on the top of him and is used to fuel Megaleg's machinary.


First Mario or Luigi must climb up its leg to get to its head, with several Bullet Bill launchers on it and gears, then get one Bullet Bill (likely from one of the launchers on its head) to hit the cage on top of his head. Then the cage should regrow so get another Bullet Bill to hit the cage then lead it inside the cage to hit the container with the Grand Star.

Alternatively, when the cage regrows, get a Bullet Bill to follow Mario or Luigi over the cage wall, and, thus, into the glass dome protecting the Grand Star.


  • Digga-Leg is a boss in Super Mario Galaxy 2 that appears to be based on Megaleg.
  • Additionally, in a Nintendo Power interview, it was stated that Megaleg would return for Super Mario Galaxy 2. This was later proven false, with Digga-Leg appearing instead.
  • The basis for this boss battle was originally supposed to be the final boss battle of The Legend of Zelda: Ocarina of Time, but was ultimately scrapped.
  • Megaleg underwent several changes prior to the release of Super Mario Galaxy: it was originally encountered in the beta version of the Good Egg Galaxy, at which point there was nothing in its cage and it was called "Snifit Bot". The earliest beta version of *Megaleg was known as "BossCrab", which had a different body design.
  • The concept of climbing atop and moving on a large being was originally intended to be used in the final fight against Ganon in The Legend of Zelda: Ocarina of Time, though this was scrapped due to the fact that one would be unable to see Ganon while atop him. **It was later reused in Super Mario Galaxy, much to the excitement of the development team.
  • Megaleg's design and functions have some similarities to the original design of the Tripod Walkers from H.G. Wells' novel, "War of the Worlds", such as having searchlights for eyes and three legs.
  • All of the other bosses in Super Mario Galaxy resemble another enemy in the game to some extent. Since Snifits don't appear in the game, Megaleg is the only boss that does not resemble another enemy. However, Digga-Leg from Super Mario Galaxy 2 looks almost identical to Megaleg, though it's different in size.