When a mysterious door appears in their Brooklyn plumbing shop, Mario and Luigi are plunged into the dangerous Subcon and the Mushroom Worlds by the mad scientist Dr. Sporis von Fungenstein.
- ISBN10 0671742043
- ISBN13 9780671742041
- Publish Date 1 October 1991
- Publish Status Active
- Publish Country US
- Publisher Simon & Schuster
- Imprint Pocket Books
- Format Paperback
- Language English