Sidequests

Festival of the Hunt
You just happen to be passing by Lindblum during the Festival of the Hunt. Lucky you! This really isn't an optional 'sidequest', more like a mandatory event to continue the plot. So anyway!

Though you only control Zidane in this sidequest, Freya is a part of it. And a tough competitor. Vivi is also participating. The point of the game is to gain as many points as possible, by killing monsters of course. Prizes are as follows: Zidane - Master Hunter and 5000 gil (oh, and a date with Dagger/Garnet); Vivi - Theater Ship Card; Freya - Coral Ring.

In order to boost Freya's chances of winning, do the following:
1] Well, since you control Zidane and you could be a possible winner, drop out by dying in battle (it won't give you a game over). This way, you don't get any points that would threaten Freya's chances of winning.
2] Don't let Vivi win. Avoid saving him from the Fang whose chasing him at the Business District. (You won't have to avoid saving him if you eliminate yourself in the first place.)
3] Do not encounter the Zaghnol during the final moments of the Hunt. Or, allow Freya to strike the killing blow so she gets the points. (Again, unnecessary if you drop out in the first place.)

It doesn't really matter who wins the Festival of the Hunt, since the plot will continue regardless of the winner.