The Ancient Dragonfly is an enemy in Mother 3. It can be encountered in battle on Tanetane Island. It appears to be a literal take on the word "dragonfly", bring a small dragon-like creature with four scrawny legs and two pairs of insectoid wings. It can use a weak fire attack that hits the entire party and may set them on fire. When Lucas and company are under the influence of the Hallucination Mushrooms, it will look like either Flint or Claus in the overworld, and an Eerie Smile in battle. After the party leaves Tanetane, these beasts can only be encountered again if the player chooses to return to Tanetane island via the ocean floor. Their battle theme is More Troublesome Guys, though Fate will play instead when they're encountered as Eerie Smiles.

Its battle sound is Battle Sound 49 which falls under Code Numbers 906 for regular attack, 907 for Smaaaash! and 908 for Miss. It is the only enemy that uses this battle sound that doesn't require hacking in order to hear it.