There is a total of 4enemy skills you can find(well thats how many i found)
one is where you get Red XIII
Another is at junon, down in the adv. study hall
In the City of the Ancients
And the final one is at the Chocobo Sages House

STAR 01 - "FROG SONG" COST - 5 MP Effect: Transforms all foes into frogs and puts them to sleep. Learn: From the green frogs in the circular forest near Gongaga Town (also from the other forests nearby).
HINT: Enemy turns into frog and sleeps.

STAR 02 - "L4 SUICIDE" COST - 10 MP Effect: All enemies with an experience level that is a multiple of 4 loses almost all their HP (you can't kill an enemy with this spell--the best you can do is reduce their HP to one point). In addition, they may be afflicted with the 'Minimum' status. Learn: Burrowing squirrel-like foes (Mu) found near the Chocobo Farm.

STAR 03 - "MAGIC HAMMER" COST - 3 MP Effect: Bop one foe on the head and gain up to 100 MP (assuming the monster has enough MP). Learn: Plant-like monsters (Razor Weed) found on the tip of the Westernmost Continent (in the dark grass).

STAR 04 - "WHITE WIND" COST - 34 MP Effect: Each ally regains lost HP and their status ailments are cured and dispelled. The amount of HP recovered depends on the current HP of the caster. Learn: The white and green cactus-like monsters in the grassy area by Junon Town , or from the winged serpents you fight if you're hit by a barrier at Whirlwind Maze.
HINT: You can't learn White Wind from a Zemzelett unless you control it and make it use the skill on you.

STAR 05 - "BIG GUARD" COST - 56 MP Effect: Has the same effect as casting Haste, Barrier, and MBarrier on all your allies. Learn: The spiky, shelled creatures with tentacles that live on the shore near the Gongaga Town.
HINT: It won't use Mighty Guard unless you control it and make it use the skill on one of your members.

STAR 06 - "ANGEL WHISPER" COST - 50 MP Effect: An angel appears above one person and brings them back to life if they are dead. They also relieve any status ailments and dispel any bad effects. In addition HP is restored to the amount shown during the skill's use; however, this can be a bane to characters with high HP because if your life is higher than the amount shown, it is reduced to that amount. You'd think that this would be a great way to weaken enemies with more than 9999 HP, but it won't work on your opponents in this manner--it will only heal them, remove status ailments, etc. Learn: From the beckoning women in the yellow swimsuits you meet in the Northern Crater if you take the right path the first time you meet your friends.

STAR 07 - "DRAGON FORCE" COST - 19 MP Effect: Increases your physical and Magic Plus defense rating. Learn: From the dragons (Dark Dragon) you meet during the descent into the Northern Crater.
HINT: You can't learn this unless you control the Dark Dragon and have it use Dragon Force on you.

STAR 08 - "DEATH FORCE" COST - 3 MP Effect: One ally becomes immune to instant death attacks (this doesn't protect you from dying if you lose all your HP). Learn: The huge turtles by the shoreline of the Westmost Continent.
HINT: You can't learn this skill unless you control the turtle and make it use Death Force against you.

STAR 09 - "FLAME THROWER" COST - 10 MP Effect: A stream of fire burns one foe for Fire damage. Learn: From any enemy that utilizes a fire breath attack. One of the earliest locations would be the room with the ladders and pipes where you fight the boss of the mountains behind Nibelheim; you can fight Dragons in that area that use Kaen Housha often. You can also learn it from the flying yellow monsters (Arch Dragon) in the Mythril Mine.

STAR 10 - "LASER" COST - 16 MP Effect: Reduces an enemy's HP by one-half. Learn: From from the Dark Dragon you meet during the descent into the Northern Crater.
HINT: You can either let the Dark Dragon use this ability on you, or you can Manip. him and use it on yourself

STAR 11 - "MATRA MAGIC" COST - 8 MP Effect: Fire a pack of missiles at one enemy for magic damage. Learn: Machines with big feet and guns for arms around Junon Town. Or from the wheeled robo-creatures in the underwater part of Junon Town.
HINT: To learn this skill from the Sweeper Custom, just control it.

STAR 12 - "BAD BREATH" COST - 58 MP Effect: Inflict multiple status ailments upon all enemies, including Confusion, Frog, Minimum, Mute, Poison, and Sleep. Learn: From the Mobor creatures (green guys with tentacles and really big mouths) living on the outside ledges in Gaea's Cliff. You can also meet them in the Northern Crater, if you take the right path the first time you run into your friends. Tip: Be sure to have some protective accessories equipped when trying to learn this skill or your party may be too weakened by Bad Breath.

STAR 13 - "BETA COST" - 35 MP Effect: A swirling red shape appears, surrounded by specks of white. All targets are hit for magic damage. Learn: The big shadow snake in the marsh near the Chocobo Farm.
HINT: This monster won't use Beta unless he's swaying back and forth and almost out of HP.

STAR 14 - "AQUALUNG" COST - 34 MP Effect: Blue bubbles strike all enemies for water damage. Learn: From the Jenova Birth in the Forgotten Capital , the Harpy in the plains surrounding the Gold Saucer ; or from the floating sea-dragon creature nin the sunken plane near the Gold Saucer.
HINT: To easily pick up this skill, just control a Harpy and choose the bottom option to make it use Aqualung.

STAR 15 - "TRINE" COST - 20 MP Effect: A Delta Force-like attack that hits all enemies for lighting damage. Learn: Godo, of the pagoda's top floor in Wutai. Also from the red spider/crab-like creature living inside the Frozen Mountain , or the spider-like boss of the mountains behind Nibelheim. . Remember, the _only_ time you can learn this skill is while fighting one of the above monsters, so learn it while you still can!
HINT: The Materia Keeper is more likely to use this against your characters than any other enemy that can use this skill. It's a good thing, too, since you can't control it.

STAR 16 - "MAGIC BREATH" COST - 75 MP Effect: Rainbow orbs hit all foes for fire, ice, and lighting damage. Learn: From the red spider/crab-like creatures living inside the Frozen Mountain. Also from the parasites in the Northern Crater.
HINT: To learn this skill from a Parasite quickly, control it.

STAR 17 - "????" COST - 3 MP Effect: A weight drops and hits for special damage. The amount is equal to the amount of damage the caster has received in battle. Learn: From the balance-like creatures in Nibelheim. Also from the purple behemoths you encounter when raiding Midgar City. Keep in mind that you won't actually learn this skill unless you take damage from it.
HINT: The Judges will use this skill eventually. You can't control them, but they're easier to run into than the Behemoths.

STAR 18 - "GOBLIN PUNCH" COST - 0 MP Effect: One foe is hit for physical damage. The damage inflicted is multiplied if your opponent has the same EXP level that you do. Learn: Goblins found on the only forested island in the northeast area of the map. 2-3>
HINT: You can control the Goblins.

STAR 19 - "CHOCOBUCKLE" COST - 3 MP Effect: A fat chocobo bounces around and hits one foe for special damage. This attack gains strength each time you flee from a battle. Learn: Go to the Chocobo Farm. Talk to the man in the barn and buy some Mimett Greens. Then go to the chocobo tracks on the Southern Continent near the forest (by Mideel). Equip yourself with a Chocobo Lure materia. When you encounter a chocobo, kill off all but one of the other enemies and use the item you bought 3 of on the chocobo. This will make the chocobo peck at the ground. At any time after that point, use the L4 Suicide skill and you may get hit by the Chocobockle.
HINT: Make sure you're in the right location (the forest near Mideel); you can't learn this skill from any other type of Chocobo.

STAR 20 - "L5 DEATH" COST - 22 MP Effect: Any enemy whose level is a multiple of 5 is instantly killed. Learn: From the Parasites in the Northern Crater.
HINT: Simply use Manipulate and then choose the middle option if you want the Parasite to use Level 5 Death on one of your members.

STAR 21 - "DEATH SENTENCE" COST - 10 MP Effect: One enemy gets a counter over their heads and dies when it gets to zero. Learn: The yellow, spiked enemies that live in front of and in the area behind the Forgotten Capital.
HINT: You can control these guys.

STAR 22 - "ROULETTE COST - 6 MP Effect: One friend or foe is randomly killed. Learn: From the floating card-jesters in the Northern Crater if you take the right path the first time you meet your friends.
HINT: You can control the Death Dealer and make him use Roulette on you. The arrow must end on the person equiped with the enemy skill materia for you to learn the skill though.

STAR 23 - "SHADOW FLARE" COST - 100 MP Effect: A black flare hits a single opponent for magic damage. Learn: From the Ultimate Weapon in ; or learn it from the Dragon Zombies in the Northern Crater.

STAR 24 - "PANDORA'S BOX" COST - 110 MP Effect: A star field and question mark appear; hits all enemies for physical damage. Learn: From the huge, bone dragons (Dragon Zombie) in the Northern Crater if you take the right path the first time you meet your friends.
HINT: As the Dragon Zombies are uncontrollable, you'll simply have to keep fighting them until they use this skill on one of your characters.