Frog

Frogs are enemies that appear mostly in the Haunted Towers and Treacherous Mansion in Luigi's Mansion 2. They are mostly harmless, simply hopping around aimlessly, though if Luigi touches one he will lose 5 HP. Luigi can use the Strobulb to turn them into coins, much like a Spider, Beetle, etc, or simply suck them up with the Poltergust 5000 for no reward. There are also gold versions that drop one Gold Bar when flashed with the Strobulb, however, unlike most other gold versions of minor enemies, they do not try to run away.