SCREENCAP THIS FOR FUTURE REFERENCE. I've figured out what Pokken Fighters is.

It's fucking Tekken x Pokemon, just like how Pokemon Conquest was a crossover. You'll be able to select both fighting Pokemon and Tekken characters to beat the shit out of each other.

And before you say, "No, Tekken would never do a crazy crossover like that!", see the Tekken Tag Tournament for Wii U.