battle

                                                      CHARACTERS
For FFX Square has decided to go back to three characters intead of four, but by pressing L1 you are able to switch characters during a battle. It's unknown yet how many times you can do this or or when you can do it.
                                                          SUMMONS
Summons in FFX when summoned will be a playable character, but when summoned all other characters except the summoner will dissappear.

And each summon will have HP and MP just like regular characters, they will also have attcacks and spells like other characters.

                                                     PLAYER ORDER
One of the biggest changes in the battle system is the ATB(Active Time Bar) is gone. In its place is a bar in the upper right corner that shows when each character can attack. So if Tidus is right after enemy A in the begining he will after monster A at the end of the battle.

But when "Haste" is used Tidus will appear more often, or the other way around is if "Slow" is used.

On the bar pictures will represent your characters, and "MON" will represent the enemy and "S" will repesent a Summon

Also when R2 is pressed you can see more of the order bar.

                                                            VICTORY
Another big change in FFX is the experience points. After each battle every playable character gains "Ability Points".