Lava Pit (Mario + Rabbids Kingdom Battle)

The Lava Pits is the fourth and final world in Mario + Rabbids Kingdom Battle. It is a volcanic area located to the west of Spooky Trails, consisting of many lava pools, mine cart tracks, a mecha-producing factory, and Bowser's Castle.

History
Mario and co. first land in the Lava Pits while pursuing Bowser Jr. and Spawny and attempting to directly stop the vortex. After exiting a mine, Mario and co. then fight Mecha Jr. and free Spawny, while Yoshi joins shortly thereafter. Venturing into the deeper part of the lava pools, they encounter the physical Megabug, which immediately captures Spawny and creates Bwario, Bwaluigi, and the Lava Queen. After defeating the threesome, Mario and co. then suddenly find that the Megabug had merged with Bowser to form MegaDragonBowser. After defeating MegaDragonBowser, the Megabug is subsequently defeated, thus restoring peace to the Mushroom Kingdom.