From the Super Mario Wiki
Super Mario RPG Enemy
Location(s) Sea, Sunken Ship
HP 80
Attack 100
Magic Attack 12
Defense 100
Magic Defense 35
Speed 6
Spells None
Sp. Attacks Mute Light Beam
Items Honey Syrup (25%), Royal Syrup (5%)
Exp. points 25
Coins 7
              Misc. stats
FP 100
Evade 0%
Magic Evade 0%
Strong Jump
Weak Fire, Thunder
Bonus Flower Attack Up! (80%)
Yoshi Cookie Bracer
Morph Rate 75%
"Look at THIS!"
In-game sprite of a Crusty underwater, with its pink coloration never revealed.

Crusty is a powerful crab-like crustacean that lives underwater, typically in the waters in and around Jonathan Jones' Sunken Ship during the events of Super Mario RPG: Legend of the Seven Stars. Crustys resemble another spiked monster, the Spikey, but the two are unrelated. A Crusty actually has a pink exoskeleton; however, since they can only be found underwater, they appear blue and their real coloration is never seen.

Crustys are very powerful monsters but are also very rare; they can only be found aiding other types of underwater monsters in battle. These monstrous crustaceans have high physical attack and high physical defense. A Crusty uses its massive pincers to inflict severe damage to an opponent 2/3 of the time, or fires a light bubble 1/3 of the time that does no damage, but with the effect of inflicting Silence. Crustys do not have any magic.

Although Crustys have high physical defense, their magical defense is low, and they are weak to Fire and Thunder. As such, Mario and Mallow can dispose of them fairly easily, especially once the latter has learned Shocker. Crustys are related to the more powerful Star Crusters.

Names in other languages[edit]

Language Name Meaning
Japanese カーニィ
From 「カニ」kani, the Japanese word for "crab"