Parasite is an enemy fought at the Coliseum, Castle Fynn, and Cave of Mysidia. They usually appear in large groups and only use physical attacks that drain the player's MP, but are otherwise not difficult foes to defeat.
Parasite is an enemy fought at Dreamscape. They attack in groups and use the dangerous Gigavolt as a counter to taking damage, and Mind Stop to inflict Stop on party members. They are otherwise not too difficult to defeat.
Parasite is an enemy fought at Northern Cave, often attacking in groups of two or three. They fight using Para Tail that inflicts Sadness and counters all magic attacks with Magic Extinguish to inflict Silence. The player can learn L5 Death and Magic Breath as Enemy Skills by using Manipulate on them.
Parasitism is a non-mutual relationship between organisms of different species where one organism, the parasite, benefits at the expense of the other, the host.