Iutycyr Tower

The Yadonoki Tower (ヤドノキの塔, Yadonoki no tō) is an exclusive dungeon only available in Final Fantasy X-2 International + Last Mission.

The tower dungeon's layout is similar to Via Infinito. It has 80 levels in total, and at every 20th level, the player has to fight a boss. On every tenth level Yuna, Rikku and Paine will have a conversation about what has happened since the events in Final Fantasy X-2, which occured three months previously.

Story
Three months after the events of Final Fantasy X-2, the now seperated members of the Gullwings had gone their own ways; with Yuna living with Tidus, Rikku working mission after mission and Paine wandering Spira by herself. However, each received a letter that called them back together to explore the Yadonoki Tower as a group.

As the trio explore the tower ruins they converse with each other over what they'd been doing since they had seperated and why they hadn't stayed in contact. The conversations escalates as Rikku expresses her jealousy towards Yuna; who had reached her goal in life and had settled down. The angry bickering between the pair caused Paine to raise her voice against them. Eventually Paine revealed that the sender of the letters was herself; citing that it was her wish to not lose the friendship that they once shared three months previously, having learned from both her previous friendship with Nooj, Gippal and Baralai and from her own lonely travels. The trio eventually traveled to the top of the tower, where they found a broken machina and not much else, however due to their conversations they realise that the machina was a bit like their group; broken, seperated. As they vowed to be more than just strangers who had met by chance, becoming friends once again, the machina began to work, and their adventures continued...

Trivia

 * If the file used during the Last Mission playthrough is 100% file, then an unlockable video will become viewable through the main menu.
 * Moving and battling in the tower is done differently from the rest of the game. Everything is turn-based, similar to Chocobo's Mysterious Dungeon. Fiends appear on the map, the player chooses their action (which can be moving, changing Dresspheres etc.), then the fiends will take an action. Finding an elevator will allow them to go up to the next floor.