"He likes to slice and dice, but a few hits are enough to cut him down to size. Drops Peculiar Cheese (10%)."
- Mother 3 Guidebook

The Ghost Sword is an enemy found in Mother 3. It looks like a smiling sword. It is first encountered in a room on the third floor of Osohe Castle by Duster in Chapter 2.

Despite being a sword, it has a terribly low defense. In contrast to that, the standard attack of this enemy can deal moderate to very high damage. It can be equipped by the Ghost Knight, increasing its offense by a high amount. This enemy is vulnerable to the "sleepiness" status ailment, and possibly a few tries from Duster's Siren Beetle.

Its battle sound is Battle Sound 51 which falls under Code Numbers 912 for regular attack, 913 for Smaaaash! and 914 for Miss.