Bomberland

Bomberland is the setting of the game Wario Blast: Featuring Bomberman!

Bomberman series
The setting of the NES Bomber Man game was an unnamed underground compound, which was the reluctant home of the original bomb-producing Bomberman robot until he was encouraged by a rumor that robots escaping to the planet's surface become human. The aforementioned planet subsequently appeared to be Earth, but was eventually named and revised as Planet Bomber, one of many locations in the Bomber Nebula.

Wario Blast: Featuring Bomberman!
Wario finds an extra-dimensional portal that links his world to Bomberland, where he plunders the area's people and treasure. He is resisted by the Madbombers and Bomberman.