Koopa Bros. Fortress
Koopa Bros. Fortress is a fortress that was once home to Bob-ombs but was taken over by the Koopa Bros. prior to the events of Paper Mario. The Koopa Bros. first traveled here in search of excitement, finding their native home of Koopa Village too boring. They were apparently well-received by the fortress's Bob-omb inhabitants at first, although Kammy Koopa's admiration of them corrupted them into the vain and evil characters players are familiar with and even made them turn up against the Bob-ombs, enslaving them. Mario, Goombario, and Kooper travel here from Pleasant Path to find the first Star Spirit, solving several puzzles and fighting enemies such as Koopa Troopas, Paratroopas, and Bob-ombs. On the way, one of the Koopa Bros. traps them in a cell, where they meet Bombette (as well as several other imprisoned Bob-ombs who had previously risen up against the Koopa Bros.), who makes an escape route by exploding. They reach the Koopa Bros., defeat them, and rescue Eldstar, the first Star Spirit.
Koopa Bros. Fortress can actually be thought of as somewhat mysterious, as very little of the large amounts of information about its history given in its Tattles and other parts of the game are specific. It is, for instance, unknown who built Koopa Bros. Fortress, a fact that Goombario himself even points out in a Tattle. According to Goombario, Koopa Bros. Fortress was first erected around the same time that Bob-ombs began inhabiting Pleasant Path (which was said earlier in Paper Mario to have been not long before the game's setting), and that the Bob-ombs soon became its caretakers, although it was confirmed that they themselves did not build it. The fortress was also said to be in ruin (perhaps due to the excessive explosions caused by the fortress's Bob-omb inhabitants, something Goombario later cited as the reason for the several cracks in Koopa Bros. Fortress's walls), although the Koopa Bros. seemed to have rebuilt it upon their arrival.
In volume 26 of Super Mario-Kun, Mario and his partners encounter the fortress later in the story compared to the games.
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