The Beastball (魔球, Devil Ball) is an item in Super Smash Bros. Ultimate.
The Beastball is a baseball originating from the real-life sport of the same name. The name is a portmanteau that includes the word "beast", reflecting its behavior of chasing opponents. Its Japanese name is a reference to the 60's baseball manga Kyojin no Hoshi, where the main character, Hyūma Hoshi, performs a similar pitching technique named 消える魔球 (Disappearing Devil Ball), wherein the baseball disappears near the strike zone and suddenly reappears at the catcher's mitt.
The Beastball functions as a throwable projectile item. After being thrown, the Beastball will initially travel a short distance forward as expected, but will quickly disappear in a flash of blue flame and reappear next to the nearest opponent, targeting them with a flaming tackle. If the initial throw hits an opponent, that foe is guaranteed to be hit by the second tackle. The second tackle has very high accuracy, being capable of hitting opponents even if they're already experiencing high knockback. Dropping the Beastball with a Z-drop will not cause it to target anyone.
Equipping the Slugger & Green Glove, Pitcher & Batter, Inuji Darumeshi or Rusty Slugger Support Spirits will give the player a Beast Ball at a start of a match.