Kempo Tiger is one of the two skins released under the Showdown Edition of the Beast Fighters offer. It could be purchased as part of an item deal for a limited time in January 2017.
Kempo Tiger could be purchased for $9.99 in a deal that included 16000 coins. It could also be purchased for $19.99 in the "Best Deal!" which included the Husky Brawl skin and either 50000 coins (Browser) or 1800 DNA (Mobile). Kempo Tiger was not available for individual purchase and may not be available for purchase in the future.
Details of this skin may vary depending on location, platform or time.
Note: The Showdown Edition of the Beast Fighters offer was released again for a limited time in late June 2020. This time the deal that included 16000 coins was lowered to 6500 at $4.99. The Best Deal was lowered to $9.99 and included only 20000 coins. The package of DNA was no longer an option on either platform.