The true form of the fake President Deling that Squall and his friends encounter onboard the Galbadia Train in Final Fantasy VIII.
The rotting flesh that clings to Gerogero's wretched frame is highly mutagenic and unstable, resulting in grotesque distortion and enlargement of the left side of the monster's body. The undead horror uses its large, disfigured arm as a spiked club, bludgeoning anyone foolish enough to come within range. Gerogero can inflict a number of unpleasant curses and afflictions upon the unprepared: The abomination can poison its opponents, send them into a berserk rage, slow their movements to a crawl, and strike them dumb or blind. Gerogero can also dispel magical effects, undoing any protective counter spells that its enemies might employ to give them an edge in battle. The monster's cancerous body is completely immune to all known toxins. As evidenced by its convincing duplication of President Deling, Gerogero is skilled in the art of shape shifting.
Assuming and maintaining someone, or something, else's shape requires concentration and energy - even a relatively small amount of stress or loss of focus can cause Gerogero to lose control and revert back to its true form. Like most undead, Gerogero is vulnerable to anything holy in nature - white magic and curative items will do it great harm (potent, life-giving spells or items, such as Phoenix Down, will destroy Gerogero instantly). The creature's awkward physiology adversely affects its balance and coordination.
(In no particular order of importance.)
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