Bob-omb Battlefield is a location in the Star World, the Second Dimensional counterpart to the Mushroom Kingdom’s Bob-omb Battlefield and is home to the Star World's King Bob-omb, first appearing in MarioMario54321's Super Mario 64 Bloopers movie The Cosmic Crystals.
In this same movie, Mario fought the Star World's King Bomb-omb. In its sequel, they search for the Cosmic Crystals, but have no luck. Tyler and his friend find the missing Cosmic Crystal on a Koopa and use it to make Tyler-Os better.