The ability to reach the hidden location, key to progressing through the game, is achieved through a sequence of events that unfold after obtaining the Rain Badge. This badge signifies the player’s success in defeating the Gym Leader of Fortree City. Specifically, after achieving this feat, the player must advance the storyline by confronting Team Aqua at Mt. Pyre and subsequently resolving the crisis at the Seafloor Cavern.
Successfully navigating these challenges is critical because it triggers a weather phenomenon across the Hoenn region. This change in weather is directly tied to the legendary Pokmon Kyogre and Groudon, and resolving their conflict is the only method to reveal the entrance to the city. Without initiating and completing these events, the player remains unable to access the final Gym challenge and continue towards becoming the Champion.
