Pokeballs allow players to summon captured beasts, Assist Trophies will allow players to summon Nintendo characters outside the confines of the Pokemon universe. As you can see above, players will be able to have the F-Zero franchise's Samurai Goroh on their side, as well as a Hammer Brother. Oh, and that Nintendog we saw back at E3? That's an Assist Trophy, as well.
Check all the images of the Assist Trophies, as well as Friday's update on Wario's moves, in the gallery below.