Originally in the KH section of EoFF Front Site :/
OLYMPUS COLISEUM
Enemies: Ice Titan (Boss); Sephiroth (Boss)
The first mystery match pits you against the fearsome Ice Titan. Be sure to be around level 78.
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Boss Fight: Ice Titan
The trick to winning this battle is the MP trick I mentioned earlier. Equip the MP Rages and the MP Haste abilities. This way, you can heal whenever you get hurt. The Ice Titan has many attacks you should look out for. The most basic attack it has is shooting icicles at you. If you lock on to its head, you can hit the icicles back at it. This is actually the only effective way to cause damage to this boss.
Another attack it uses early on involves it shoving its hand into the ground. Icicles pop up all over the battlefield, and the first one will usually target you automatically. Use Dodge Roll to avoid this attack.
Do not cast Aeroga during this battle. Doing so will cause the icicles to become too big to hit back at it
It can also summon three large ice boulders that fall on you. When you see it spread its claws (you'll get familiar with the attack pattern) run horizontal across the screen to avoid the boulders.
It can sweep the arena with its icy breath. If you are hit by this attack, you'll freeze into and ice block. If you jump over it, be sure to glide forward a little, so you don't slip on the icy residue. A flurry of icicles always follows up this attack.
Oh yeah, and watch out for the shockwaves that emanate from the feet.
Use the icicles to cause small damage to the head (after locking on of course). After a while, the Ice Titan will keel over for a few precious seconds. Use special abilities sparingly, unless you have a lot of Ethers in stock. After taking a chunk of health away, the Ice Titan will rise once again.
Every time it gets knocked down, the Ice Titan will modify its attack pattern. After it gets knocked down a second time, you'll want to stand on the bleachers as far away as possible. It has an attack that covers everything in its immediate range and then some. If you are far enough away, you won't even be hit. If you are too close, prepare to be frozen several times. A flurry of icicles (and later ice boulders) always follows this attack.
EXP. 5000