Gem slime

Gem Slime, (or Gold Slime in the Game Boy Color versions of the games) is a very powerful metal-bodied monster from the slime family. Gem Slime is widely regarded as one of the most powerful monsters in the game, due mostly to its exceedingly high stats (barring HP) and useful number of resistances and immunities due to its body being made of metal. In all series of the games, Gem Slime or equivalents tend to be very difficult to obtain, being impossible to capture in the wild in most games.