Heroic Sword

The Heroic Sword is a treasure in. It is actually an orange sword-shaped.

Frozen Inferno
There is a Heroic Sword lying on the ground at the far west side of sublevel 1 of the Frozen Inferno, next to an Octoplus. To collect this treasure, you must throw a fire starter at the bundles of straw in front of it, or hope a Pyroclasmic Slooch ignites them. Then, throw 1 Pikmin at it.

Cavern for a King
There are two Heroic Swords inside of a Man-at-Legs in the center of sublevel 9 of the Cavern for a King, alongside two Bright Swords. To collect them, you must first defeat the Man-at-Legs, then throw 1 Blue Pikmin at each treasure.