Even if the game hasn't been released, that doesn't mean no one was able to get a copy
. And sprite ripping doesn't require the system to be emulated. Actually it's fairly easy if the graphics aren't compressed/encrypted. Plus, the graphics format for the DC is already well documented, and the Atomiswave's hardware is virtually identical to it.
Actually though, my best guess is that SNK themselves released the gif, either on their website or in some sort of promotional material.
Actually though, my best guess is that SNK themselves released the gif, either on their website or in some sort of promotional material.