Pokkén Tournament's official site updated with new info on the game, including a "How to Play" manual and two new assist Pokémon revealed:

Pokken Tournament

Pokken Tournament2

Both Frogadier and Eevee have been confirmed as assist Pokémon, which was only hinted at before. There's also the manual, and it seems that the controller configuration is D-pad based instead of arcade stick based.

There's also a location test coming up this Sunday, so it'll be exciting to see what players can pull off.