Mega Horn

The Mega Horn is a treasure in. It is a golden bulb horn meant to be attached to a bike.

Collecting the treasure
The Mega Horn is lying on the ground near the north of sublevel 4 of the Subterranean Swarm. It is guarded by two Flighty Joustmites, which should be defeated before attempting to collect it. To collect this treasure, you must throw 15 Pikmin at it.