Smorg (Jap.: モアモア, Moamoa) is a minor antagonist in Paper Mario: The Thousand-Year Door, being the main antagonist of Chapter 6.
This boss does not hold a Crystal Star, but it attacks the Excess Express during the ride to Poshley Heights. This boss is made up of a massive horde of smaller Smorgs and the base was made up of Magenta Smorg. They are first seen at the Riverside Station, where they lift the drawbridge to stop the train from going far (it is unknown if it is working for the Shadow Sirens to stop Mario and his teammates from reaching the Garnet Star).
Later on, they stow away on the train and kidnap the passengers. Mario and his teammates fight the Smorgs on the rooftop of the train to rescue the passengers. When they are defeated, they will blow away in the wind and release the passengers.
In the beginning of their fight, three tentacles will surround the main body, and near the end, they are replaced with a pincer claw that can do a large amount of damage to Mario and his partner.
- Its name may come from the word "smog", based on its dark, cloudy appearance, and the term miasma, referring to a poisonous cloud and/or dangerous atmosphere, likely referencing the appearance (the "tentacles", specifically) and hostile nature of the Smorgs.
- Smorg is the only chapter boss in Paper Mario: The Thousand-Year Door (with exception of the Shadow Queen) that does not possess a crystal star.
- Smorg, Cortez and Macho Grubba are the only three bosses that have no known relation to the Shadow Queen or Sir Grodus.
- The smaller Smorg resemble Fuzzies.