Two new Mario platformers for Wii in one press conference? Believe it. Nintendo has just unveiled Super Mario Galaxy 2, which, as the company pointed out, will mark the first time two 3D Mario adventures have appeared on the same platform.

Mario's back traversing the galaxy on spherical worlds -- and he's brought an old friend: Yoshi. As in Super Mario World, Mario will ride Yoshi, who can now obtain power-ups of his own, including one that makes him puff up like a balloon. Mario's bee suit will make a return from the first Mario Galaxy as will classic side-scrolling style levels.

So, folks -- are you jazzed, even though we don't have a release date?

This article was originally published on Joystiq.