Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, make sure to focus on upgrading your characters’ main stats first before branching out to learn new abilities. Don’t be afraid to backtrack to previous nodes to grab important stat boosts.

For side quests, be sure to complete the Monster Arena challenges for great rewards and to unlock some of the best items in the game. Also, don’t forget about the Celestial Weapons quests for your party members – they are powerful additions to your arsenal.

When it comes to character builds, consider specializing each character in a specific role to maximize their potential in battles. For example, Tidus makes a great physical attacker, Yuna excels in white magic, and Lulu is a powerhouse in black magic. Experiment with different combinations to find what works best for your playstyle. Happy exploring!