Heads up, the greatest (well, IMO opinion anyway) King of Fighters of them all is now mobile on both Android and IOs. '98 remains a favourite among my group of friends because it has the best roster and the best set of moves for every character in the series. Best of all it, won't cost you a thousand dollars like the original cart, just a few coins.
Mobile gaming still isn't for me, in fact my Android tablet has buttons and d-pads because I just can't let go of the old ways. But hey, if you spend your time playing video games on mobile, make sure you browse around for classics like "The King of Fighters 98"!