Giant Shadow - Disappear when they hit you.
Sniper Wild - You need to kill 6+ of them without being seen.
Black Ballade - You need to play a
shell game, picking the right one when they shuffle.
Stealth Soldier - Invisible super fast Soldier that hits hard. You can make them visible by casting Stop, but it wears off in a second.
Chimaera - Keeps summoning Gargoyles and jumping around, you need to stun it and keep him from getting up by hitting the floating balls of light he spews when he is down.
Grand Ghost - Can only be defeated by throwing healing items at him, but he disappears all the time, messing with your aiming menu.
Pot Scorpion - Can only be hit after you defend against his tail sting, which he only does after spraying poison all over the place.
Jet Balloon - You need to pursue it around the ship, impossible without Aeroga because of the hundreds or torpedoes he fires.
Pink Agaricus - Stop minigame we've been talking about in the last few posts.
NeoShadow - You need to fight about 6 of them at the same time, they hit hard, teleport around and fully heal nearby enemies when defeated.