Baseball (object)

A baseball is the main focus of the Mario Baseball series. They have also made small appearances in various minigames in Mario Party, which are usually baseball-related, such as Swing Kings. Baseballs have also appeared as a throwing item in Super Mario 3D World.

Super Mario World
In the Mario franchise, Baseballs first appear in Super Mario World as projectiles used by Confused Chucks. They are thrown at constant pace, traveling on a horizontal line through the air. They cannot be stopped or destroyed and can damage Mario or Luigi if they hit them. However, Confused Chucks will stop throwing baseballs if attacked, upon which they start behaving like regular Chargin' Chucks.

Super Mario 3D World
Baseballs appear in Super Mario 3D World as throwable objects. They can be found lying around in various places, being introduced in Really Rolling Hills. Players can pick them up and throw them at other enemies to defeat them; if other players are hit, they are knocked back (but not hurt or defeated). In addition, baseballs can be used to get Green Stars from a distance, and the World 6 Mystery House requires the use of baseballs to obtain all Green Stars.

Mario Baseball series
Baseballs make their first major appearance as the main focus of Mario Superstar Baseball and Mario Super Sluggers. Baseballs are used in the same fashion as baseball in real life: pitchers throw them to batters, the batters swing and attempts to hit the ball, and fielders catch the ball and attempt to get the batters and runners out, but with some additional Mario spins added, including Power Shots and Error Items.