Hey there fellow Final Fantasy X explorer! When it comes to sphere grid progression, my tip is to focus on each character’s strengths. Make sure to unlock key abilities and stats that complement their roles in battle. Don’t be afraid to mix and match different paths on the grid to create unique character builds.

For side quests, be sure to tackle the monster arena challenges for some great rewards and tough battles. Don’t forget to hunt down all the celestial weapons and aeons for that extra edge in combat. And of course, the infamous chocobo racing and butterfly catching mini-games are a must for completionists!

As for character builds, experiment with different sphere grid paths to find what works best for your playstyle. Whether you prefer a tanky Auron, a magic-focused Lulu, or a speedy Tidus, there are endless possibilities to customize your party. Just remember to have fun exploring Spira and uncovering all it has to offer!