The word on the title "Pokkén" is a combination of "Pokémon" and "Tekken". And the game's title and logo are very similar to Tekken Tag Tournament 2. However, the name of the game is called "Pokémon Tekken" in Germany and Austria. The title was most likely changed to avoid sounding like the German word "pocken," which means "smallpox."
Contributed by ProtoSnake