Number Ball

Number Balls are types of balls that were first introduced in Yoshi's Island DS. They appeared in the levels Six Face Sal's Fort and Find the Number Ball!. The player can pick them up and throw them like regular Eggs. There are certain slots for Number Balls, and the player must shoot the balls at them to activate something in that specific level.

Trivia

 * Number Balls were most likely based off Billiard balls.