Final Fantasy X is a video game in the well-known JRPG series from Square Enix.
GAMEPLAY HINTS
Monster Arena: Easy Gil
Have an attack that does at least 50,000 damage. Quick Hit is recommended. Release One-eye in special contest by capturing at least four of each species of One-eyes in all Spira.
You can get between 300,000 and 1,000,000 gil by defeating One-eye. Also, sell the items he drops (such as those with Triple AP Auto-ability), to get more.
Omega Ruins Easy AP
Find Omega Weapon (this can also be done with Ultima Weapon). Have Rikku Mug from him and you will get 10 Doorway Tomorrows. Do not waste these -- they can give your weapon Overdrive > AP, which gives you AP every time your Overdrive meter fills, then set the Overdrive of the owner of the weapon to ally, which will charge the Overdrive meter. Next, go to the Cavern Of The Stolen Fayth and fight a Pot.
The Pot will not do anything until you attack it. Put the owner of the weapon with the Overdrive > AP ability in your party. Keep Triangle held for at least half an hour (use a rubber band), then flee. The person will get one Sphere level up. This works best with Lulu and her weapon Space Master, which has the ability Triple Overdrive.
Omega Ruins: Easy gil
Get Rikku's Legendary Weapon and use the specified crest and sigil to power it up fully. It will then receive the Gillionare ability. Go to the Omega Ruins and find a Zaurus and treasure chest to fight. Steal from the treasure chest with Rikku. Do not Mug it, as this will kill it. Assuming that the treasure chest has nothing in it, it will turn out as a Mimic. Defeat the Mimics to get 100,000+ gil each time.