Hey fellow Final Fantasy X explorer! When it comes to the sphere grid, I recommend focusing on each character’s strengths. For Tidus, prioritize agility and speed to make him a swift attacker. For Lulu, enhance her magic stats to deal massive damage with spells. Don’t forget to use Key Spheres to unlock new paths efficiently.

For side quests, be sure to complete the Monster Arena challenges for valuable rewards and tough battles. The Celestial Weapons quests are also a must for ultimate gear. Lastly, don’t miss out on the optional Aeons and secret bosses for an extra challenge. Happy exploring!