31ball , also known as Spookyball is a caveball depicting creatures that are typically considered "spooky" and "Halloween-y". While there has been no proof of its existence, many stories and legends have been told about it coming out at night and eating living people, typically at graveyards, carnivals, front porches, etc. However, some have claimed that they exist as a species of 
6ball.
    Caveballs   
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| 1-8 Caveballs | 1ball • 2ball • 3ball • 4ball (.png){kind=icon} Middle Eastern version) •  Australian Aboriginalsball ( 5ball) • 6ball • 7ball ( Maoriball) • 8ball
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| 9-16 Caveballs |  9ball (.png){kind=icon} Zombified version • .png){kind=icon} Antarctican version) •  10ball •  11ball •  12ball •  13ball •  14ball •  15ball •  16ball
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| 17+ Caveballs | File:17-icon.png 17ball • File:18-icon.png 18ball • File:19-icon.png 19ball • File:20-icon.png 20ball • File:21-icon.png 21ball • File:22-icon.png 22ball • File:23-icon.png 23ball • File:24-icon.png 24ball • 31ball •  71ball •  404ball •  666ball
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