Boomsday Machine

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Boomsday Machine
Artwork of Boomsday Machine from Super Mario Galaxy 2
Galaxy Bowser Jr.'s Boom Bunker
Mission(s) Bowser Jr.'s Boomsday Machine
Boomsday Machine Daredevil Run
World World 5
Star given Grand Star icon in Super Mario Galaxy 2.Prankster Comet icon in Super Mario Galaxy 2.
My dad's gonna get angry if I let you get another Grand Star... Time to break out my Boomsday Machine! I'll just relax in my comfy cockpit and watch you go BOOM!”
Bowser Jr., Super Mario Galaxy 2

The Boomsday Machine is a castle-like tank invented by Bowser Jr. that appears in Super Mario Galaxy 2. It has three Fire Bars circling around it and the top section has a spinning-like mechanism. It is fought in the level Bowser Jr.'s Boom Bunker. The music heard during this battle is the same as in the Bowser Jr.'s Airship Armada battle. Its name is a portmanteau of the onomatopoeia "boom" and "doomsday".

Cloud Mario, fighting the Boomsday Machine

There are ample Cloud Flowers around the area to grab. The player must use Cloud Mario's ability to ascend the battlefield and get to the top of the Boomsday Machine. For the first round, they must run for one of the updrafts and spin to create a cloud and ride it upwards. From here, he can traverse across the various clouds scattered throughout the battlefield, using his cloud-making ability to assist him. Once they reaches the top of the tower, they must damage the machine by Ground Pounding the glass. If Mario stands on the glass cockpit for too long, Bowser Jr. will spin his launcher to knock Mario off.

The second round is much like the first, but now the tower will attempt to vacuum the area, pulling the clouds out from under the player's feet. They should still be able to just long jump to the top of the tower in the same manner. The player also needs to watch out for an electric shield that covers Bowser Jr.'s dome periodically when he is sucking up Clouds.

A screenshot of Cloud Mario fighting the Boomsday Machine.
Cloud Mario, fighting the final form of the Boomsday Machine

In the final round, the tower goes mobile. This makes the player's climb to the top more difficult, since Bowser Jr.'s cockpit is much higher up. They still need to avoid coming in contact with the yellow projectiles, the spinning fire wheel and the vacuum attack. The fire on the Boomsday Machine will also destroy the player's clouds.

Once the player reaches the top of an updraft, they need to use the Cloud Flower refill to get to an even higher cloud tier. They should use long jumps to get to the distant cloud and they can score another refill. From here they can reach the dome with their cloud platform recharge. Once the player arrives at the glass dome, they must Ground Pound it a third time, which destroys the machine and reveals the Grand Star.

Mario faces this boss twice, with the second match being under a Daredevil Comet's conditions.

Additional names[edit]

Internal names[edit]

Game File Name Meaning

Super Mario Galaxy 2 ObjectData/KoopaJrCastle.arc KoopaJrCastle Bowser Jr. Castle
Super Mario Galaxy 2 SystemData/ObjNameTable.arc/ObjNameTable.tbl クッパJrキャッスル (Kuppa Jr Kyassuru) Bowser Jr. Castle

Names in other languages[edit]

Language Name Meaning
Japanese バトルキャッスル
Batoru Kyassuru
Battle Castle
French (NOE) Tank Cataboum Cataboum Tank; Cataboum is pun on "catastrophe" and the onomatopoeia "boum"
German Megamurks-Maschine Mega butch-Machine
Italian Torrattacco Attack Tower
Korean 배틀캐슬
Battle Castle
Spanish Tanquetorreta Tankturret