Yes. Pokkén Tournament (or Pokemon Tekken) will be released exclusively on the Wii U early next year. So far, it has not been announced to be coming to the 3DS or any other Nintendo console unfortunately.
Do note, however, that the game was originally released on Japanese arcade machines in July this year. So technically it's not exclusive to the Wii U, but outside of Japan, the Wii U is all that's available. (Besides, who plays Pokemon on an arcade machine?)