Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, make sure to focus on developing each character’s strengths. For example, Tidus is great for agility and speed, while Auron excels in strength and defense. Don’t be afraid to mix and match different paths on the grid to create unique character builds.

As for side quests, be sure to complete the Monster Arena challenges for some great rewards and tough battles. You can also hunt down the elusive Dark Aeons for the ultimate challenge. And don’t forget about the celestial weapons – they require some dedication to obtain, but they are well worth it for the power they provide.

Lastly, experiment with different character builds to find what works best for your playstyle. Whether you prefer a well-rounded party or specialized roles, the sphere grid allows for endless customization. Happy exploring!