|Country of Origin||United States|
|Weapon Type||Disorientation Grenade|
The M84 Flashbang Grenade is a stun grenade designed and developed by Picatinny Arsenal in the United States. It's designed to only to temporarily stun or blind any enemy for a short period of time. This allows the opposing force to dispatch disoriented enemies quicker.
The M84 makes an appearance in Mario Warfare where it is sent rolling into the bathroom by a Shy Guy during Invasion Day. Mario bravely dives on the grenade in an attempts to save his brother Luigi, however ends up disoriented by the blast causing Shy Guys to take Luigi hostage and bring him to the Hammer Brothers.