Bowser's Lava Lair

Bowser's Lava Lair is a galaxy appearing in Super Mario Galaxy 2, and is the final galaxy of World 2. As the name suggests, the galaxy is full of lava. There are also Whomps. Bowser is seen sitting on a throne there, which looks like a castle. To defeat Bowser and win the Grand Star, Mario must hit Bowser's arms three times with meteors when he tries to hit Mario.

The music is again a remix of the song first featured in Super Mario 64, Koopa Road, with a chorus.

Starting Planet
A simple planet with a few columns on the sides and a Magikoopa that spawns Burn Bits with its magic.

Cylindrical Planet
This planet contains some lava and platforms that move over it. On one side of it is a springboard and a Luma.

Fireball Planet
Very similar to the Cylindrical Planet, but with less platforms and several fireballs spinning rapidly on the sides of it.

Lava Planet One
A large planet with surrounded by lava. There are several enemies here, like Whomps and Hammer Bros. The Toad Brigade is also found here. Mario will also find a door with a big lock which he must break by ground pounding meteors. Mario will also encounter some platforms that spin to throw Mario into the lava.

Lava Planet Two
A rather small planet compared to the last one. Also surrounded by lava, there are some Mattermouths and at the end there are two Hammer Bros. just before the big door before the battle.

Bowser Battle Planet
It is a small planet made of black bricks and a few rocks that Mario can break to get coins. Here, he will battle Bowser by ground pouding meteors at him.

Bowser's Big Lava Power Party
To get the Grand Star, Mario has to make his way to Bowser. To do so, he has to defeat the Magikoopa in the first planet to make a Pull Star appear. Then, he must use it to get to the Cylindrical Planet. Here, he must avoid the lava and make his way to the Spring. When he uses it, he'll get to the Fireball Planet. He has to do the same thing here, except he has to use a Launch Star and not a Spring. Once he lands on the first Lava Planet, he must find a platform with a Hammer Bro. on it. When defeated, he'll drop a Launch Star that leads Mario to another lava area. Here, there is a witch on a brown platform. If Mario activates it the platform will fall which allows Mario to explore the rest of this planet. When done so, he has to make his way to a closed gate. Mario can break the lock using a meteor. After entering the door, a force will take Mario to the second Lava Planet. Like in the first one, Mario has to make his way to the Bowser Gate by using Snake Blocks and break the locks by using meteors. This time, the force will take him to the Bowser Battle Planet.

Here, Mario must defeat Bowser in a battle. If done so, Bowser will leave and drop the Grand Star.