The Mega Parasite, also known as M.Sucker, Megapara or Lifesucker, is an enemy from Final Fantasy II. Its attacks may cause Amnesia. Its arsenal includes two powerful sapping attacks, Osmose X and Drain XVI.
Mega is a unit prefix in the metric system denoting a factor of one million (106 or 1,000,000). It has the symbol M.
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.