Energy balls were round grenade like balls of electrical energy, which could easily destroy Droids and kill or stun most Humanoids.
Star Wars: Battlefront Series[]
Star Wars: Battlefront[]
In Star Wars: Battlefront the Gungans use energy balls, but are not playable. They function like EMP grenades.
Star Wars: Battlefront II[]
In Star Wars: Battlefront II the Gungans use energy balls in Hunt mode, and are playable. They function like standard Grenades