Thwomp Caverns

Thwomp Caverns (Japanese: ドッスンボルケーノないぶ Inside Dossun Volcano) are caverns that are inside Thwomp Volcano, in the game Mario & Luigi: Partners in Time. Predictably, inside the caverns there are a lot of Thwomps.

In the game, after Bowser kidnaps Princess Peach, Bowser accidentally falls in a Time Hole and appears on Thwomp Volcano, where he jumps inside the volcano and appears in Thwomp Caverns. Baby Bowser also falls here after getting blasted out of Yoshi's Island.

Baby Bowser and Bowser start fighting with each other while Mario, Luigi, Baby Mario and Baby Luigi climb Thwomp Volcano and jump inside it to get to Thwomp Caverns, after a mini boss battle with Mrs Thwomp. The Mario Brothers then make to descend down the caverns on a Thwomp Elevator to reach Bowser and Princess Peach, although a few times the elevator is unable to move downwards, caused by coloured blocks blocking its path. Mario and co. go through the area, coming across Thwomps in the process, and hit the small blocks which make the big coloured blocks disappear, then allowing them to continue downwards. After a while the Mario Brothers reach Bowser and Baby Bowser, and it seems like they have stopped fighting and became good friends. A boss battle starts, and after Mario and Company defeat Bowser and his baby counterpart, and are about to save Peach, the Shroob Mother Ship comes and sucks Mario, Luigi, the babies and Peach in, and the U.F.O. leaves. Also seen after defeating Bowser and his younger self is a cutscene where Baby Bowser and Bowser land on the elevator, and it shoots upwards, making Bowser fall into the time hole far below that Mario and co. came out of to enter the stage, and Baby Bowser remains on the Thwomp Elevator, but it gradually begins to fall back down and hit the top of the Shroob Mother ship in which Princess Peach, Mario, Luigi and the babies are soon trapped inside of. The fate of Baby Bowser is not seen in the Thwomp Mountain stage.

The Thwomp Caverns have lava inside and it erupts every year. Many Thwomps like seeing the lava erupt, most notably Mr. Thwomp and Mrs. Thwomp. However, once Mario, Luigi, and the babies, came here, they stopped the volcano from erupting thanks to E. Gadd's help.

Enemies

 * Blazing Shroob
 * Gold Koopeleon
 * Thwack Totem
 * Bowser and Baby Bowser (Thwomp Volcano Boss)