Bowser's Big Lava Power Party

Bowser's Big Lava Power Party is the first mission of Bowser's Lava Lair in Super Mario Galaxy 2. The mission's objective is to navigate the lava planets and defeat Bowser.

Mission
To start off the mission, Mario 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 switch 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 meteorite. 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 takes him to the Bowser Throne Planet. Bowser challenges Mario and take him to the Bowser Battle Planet.

Here, Mario must defeat Bowser in a battle. If done so, Bowser leaves and drop the second Grand Star, which allows him to go to World 3.