Mystery Metal Monkey

The Mystery Metal Monkey Is a rare enemy in Mother 3. It is found in Argilla Pass despite its low HP count, it has a high defense, making it hard to beat by normal means. When defeated, it yields a "good experience" which is worth 0 exp. It is a parody of the Metal Slimes found in the Dragon Quest series.

Battle Memory description
"Fighting this metal monkey will result in quite the experience. Just keep that in mind."