Starship X-Naut
Starship X-Naut is a huge franchise of what would appear to revolve around a television program mentioned in Super Paper Mario. It is brought up many times in Fort Francis, although it is never mentioned outside of that area.
As stated above, the main aspect of Starship X-Naut is thought to be its television show, which is mentioned early in Fort Francis by a MeowMaid who stated that a baseball game in extra innings had delayed that day's episode of the show (and that she had changed the times set in the RecordoMeows to reflect the delay), which is one of Francis' many obsessions. In the same room, another MeowMaid mentions Starship X-Naut: Space Bloops, a seemingly Blooper-oriented videogame spin-off of the show known to be a space-combat simulator. Both of the SecuriMeows' quizzes (which are given to Mario and friends to gain access into Francis' private rooms) also mention Starship X-Naut, one of which revealing that it includes a comic series (whose comics Francis believes should never be taken out of their plastic sleeves) and the other mentioning Starship X-Naut "Series 3 collectible action figures", which Francis himself does not own to the greatest extent (although completing his collection of the figures is one of his many goals). Finally, Francis' unnamed, cat-like door's compatibility quiz to Princess Peach suggests that Francis is attracted to (or at least can relate to) people who have lost friends due to arguments based on the propulsion system of a spaceship featured on Starship X-Naut.
As these are the only mentions of Starship X-Naut, much about the show is left to assumption. Based on its name, it is thought that Starship X-Naut stars (or prominently features) the Secret Society of the X-Nauts, the antagonists of Paper Mario: The Thousand-Year Door. (It is also undoubted that the show's name is a reference to Paper Mario: The Thousand-Year Door on Nintendo's part.) It is unknown if Starship X-Naut has any affiliation with The Grodus Chronicles, another unseen Super Paper Mario show that is named similarly in that it holds another major Paper Mario: The Thousand-Year Door foe as its namesake, although it is likely that it does not.