Bowser Jr.'s Boom Bunker is a galaxy and the final galaxy of World 5 in the game Super Mario Galaxy 2 starring Bowser Jr. as the boss for the final time in the game. It has a darker appearance compared to its predecessors. Enemies found here inclue Fizzlits, Bullet Bills, Boomerang Bros., and Dry Bones. Mario can only visit this galaxy once he grabs 55 Power Stars.
Bowser Jr.'s Boomsday Machine
Boomsday Machine Daredevil Run
Can Mario complete Bowser Jr.'s Boomsday Machine without taking damage?
Green Star 1
Climb on one of the flagpoles that appear on the second planet.
Green Star 2
Aim to the west of the Spinning Platforms Planet.
Starting Planet (Megahammer's Junkyard)
A destroyed Megahammer appears here.
Boomerang Bro fort planet
Use the Cannon to make your way forward. This planet's equator is straddled with an electric barrier.
Spinning Platforms Planet
Dark Matter Area
- This is the only boss galaxy whose background lacks an orbiting blue planet in the background in Super Mario Galaxy 2. This is similar to Bowser Jr.'s Lava Reactor in the first game in the franchise.