Thunder Plains

The Thunder Plains will keep you on the edge of your seat. Not only is it an excellent place to level up, but you also have to contend with the lightning. To dodge a lightning bolt you must hit the X button as soon as you see the flash before the bolt hits Tidus. This sidequest is explained in more detail in the Lightning Dodging section. Also note that you will find stones with Quactuars engraved on them. For more details on this check out Kimahri's section on the Ultimate Weapons page.

Upon entering the area grab the two Phoenix Downs in the chest right before the save point. Make your way along the left side of the area to find a chest with 2 Hi-Potions and 5000 gil. After that switch over to the right side. In a small alcove you'll find a Water Ball for Wakka. After that head straight for the top exit from this section of the plains. At the travel agency Rikku insists on a break. In the agency you'll find two books. The one on the counter explains the presence of the Quactuar stones. The other book, on the table to the right, records your lightning dodging proficiency.

After checking out the books speak to Rikku. After this Rin enters from the hallway. He'll ask Tidus how his study of Al Bhed is going - choose the first response and Rin hands over Al Bhed Primer XIV.

After that head into the hallway to the right and Tidus will accidentally end up in Yuna's room. After the scene here you're free to leave the agency.

Just before you exit the area outside the agency you'll find a Yellow Shield on the ground. On this next stretch of the plains you'll want to go around to the area where the path goes directly from one stretch of plains to the next, bypassing the agency. At the far right here you'll come across an X-Potion.

After this continue through the area. At a certain point Yuna decides she has something important to say so the group takes shelter in a large ruin. After the scene go behind the ruin to find a chest with an Ether. Lastly on the right side you'll find a chest with 2000 gil. Then go ahead and exit the plains and continue to Macalania Woods.