Enemy Skill Materia

Enemy Skill is a Command Materia from Final Fantasy VII that works in the same manner as Blue Magic. The Enemy Skill materia can be used to learn certain specific enemy spells when a character equipped with the materia is successfully targeted by that spell. The character permanently learns the spell only if he or she survives the battle. Some Enemies have to Manipulated to learn the Enemy Skill because they will never use it until you force them to by choosing their actions.

There are four E. Skill Materia in the game:
 * 1) In the sample tank in Hojo's lab after Red XIII joins the party
 * 2) In the Beginners' Hall (Intermediate) in Junon
 * 3) In one of the houses in the City of the Ancients
 * 4) Received from the Chocobo Sage's Mountain Chocobo

Obtaining rare Enemy Skills
Trine can only be learned from three enemies: Materia Keeper, Godo and Stilva. Since the first two are bosses and the latter is found only at Gaea's Cliff (which is a one-visit area)***, Trine is the only E. Skill that can be missed permanently.

Most of the rarer Enemy Skills can be obtained in the Northern Crater at the end of the game:
 * Parasite uses Level 5 Death and Magic Breath
 * Dark Dragon uses Dragon Force* and Laser
 * Malboro uses Bad Breath
 * Dragon Zombie uses Shadow Flare and Pandora's Box****
 * Pollensalta uses Angel Whisper*
 * Death Dealers use Roulette
 * King Behemoths use ????

Obtaining Roulette can be extremely frustrating, but the simplest method by far is to obtain Death Force from an Adamantaimai, then when fighting Death Dealers just cast Death Force on both the Death Dealer and the character you want to learn Roulette. This way, you can Manipulate the Death Dealer to cast Roulette until it successfully lands on the character, safe in the knowledge that the character can't die from being hit with it, and the Death Dealer won't KO itself during the attempts.

* These are support skills, so the enemy must be Manipulated to get them

** While Blue Dragons do carry Dragon Force, you can't learn it from them because they are not a Manipulatable enemy

*** Stilvas can appear in the Gold Saucer's Battle Arena, but it isn't possible to learn Trine because Enemy Skills can't be learned from the Battle Arena

**** Only used once due to intentional programing. Even if the Dragon Zombie can't cast it due to not having enough MP, none of the others will cast it ever again