World 20

World 20, also referred to as the Halloween World, is a world taking place in a spooky forest in Dr. Mario World. The first area is available as of 12 AM PT on Sept. 24, 2020, while the second area, challenge stages and special stage are available as of 11 PM PT on Oct. 7, 2020.

When an area is cleared, Broozers, Boos, Peepas and Swoops appear. The viruses featured in the regular stages are red, green and light-blue.

Profiles

 * Dr. Mario World Twitter:
 * Yellow: "New stages will be added Sept. 24, 12 AM PT. It's suddenly getting cooler outside... You know what that means? Fall is here!"
 * Yellow: "The second half of the Halloween World has been added! And the special stage reward is King Boo (we secretly told you about that already). I wonder if Jack-o'-Lanterns taste good? Hmm..."