With Microsoft and Sony having unveiled their answers to the Wii remote at their E3 presentations, and with Nintendo riding high on the success off the Wii and the just-launched DSi, the company of Mario, Link and Samus staked its E3 fortunes to games for its industry-leading devices. Over the course of Nintendo’s presentation Tuesday morning, we saw two new Mario games, as well as an edgy new “Metroid” game and a follow-up to “Wii Fit.”

By far the most bizarre announcement of Nintendo’s keynote, though, was the one piece of hardware the company announced. The Wii Vitality Sensor plugs into the Wii remote and looks like one of those “insert your finger to find out out your love rating” games you’d see in a cheesy dive bar, right next to the primitive video strip poker machine. No idea what it will cost, or what its uses will be. If I had to guess, I’d say it’ll have some sort of biofeedback-related integration with the newly announced “Wii Fit Plus.” Despite a brief announcement that the DS would be getting some integration with Facebook, the stars of Nintendo’s keynote were clearly “Wii Fit Plus” and the other new games the company announced. Here’s a summary of what’s looking good:

“New Super Mario Bros. Wii” (Due out “Holiday 2009,” which I’d take to mean December): As the name suggests, this platform-jumping game plays more like the DS’ “New Super Mario Bros.” than “Super Mario Galaxy” on the Wii. It’ll allow up to four players (!) at a time, and action is controlled entirely with the Wii remote. Basically, you turn the thing on its side and use it like an old-school NES controller. One motion control for the game they did show off is a propeller suit that allows Mario to fly when you shake the Wii remote. This looks like a great game for adults who grew up with the original “Super Mario Bros.” to play side-by-side with their kids.

“Super Mario Galaxy 2” (2010, Wii): I don’t really think anyone was expecting Nintendo to announce two “Super Mario” games, but here you have it. This will play more like a follow-up to one of the Wii’s best received games. It’ll be a 3D platform jumper set in space.

“Mario & Luigi: Bowser’s Inside Story” (Fall, DS): The Wii isn’t the only Nintendo platform getting some Mario love. This adventure for the DS combines the series’ usual side-scrolling platform-jumping with role-playing game mechanics. You’ll be inhaled at the get-go by Mario and Luigi’s nemesis, Bowser, then travel throughout the inside of his body in an effort to save the Mushroom Kingdom. During an RPG-heavy segment, Nintendo also showed trailers of Square Enix’s “Final Fantasy Crystal Chronicles: The Crystal Bearers” and “Kingdom Hearts: 358/2 Days” (Wouldn’t that be 179 days?). A “Golden Sun” game for the DS was also shown.

“Metroid: Other M” (2010, Wii): This collaboration between Nintendo and Team Ninja (“Ninja Gaiden”) explores the origin story of Metroid series heroine Samus Aran. Team Ninja has a sterling track record, but it also saw the departure of several key creative types (including studio head Tomonobu Itagaki) amidst a lawsuit over unpaid bonuses. Still, there should be enough folks left to make a heck of a game, and what little was shown looked great. Combined with this fall’s “Metroid Prime Trilogy’ rerelease, this could vault the Metroid series to new heights of popularity.

“Wii Sports Resort” (July 26, $50): We already know all about the sequel to “Wii Sports,” which will release next month and be available with our without Wii MotionPlus, the new accessory that will allow for more realistic motion tracking. Speaking of MotionPlus, the same demo in which they showed off “Wii Sports Resort” also included “Tiger Woods PGA Tour 10” and “Red Steel 2,” other, already-announced games that will use MotionPlus.

“Wii Fit Plus” (Due out this fall, price unknown, but it will be available separately and bundled with the balance board): I’m not really aboard the whole exergaming craze: If I want to work out while I game, I’ll fire up a board or turn-based strategy game and ride the exercise bike. That said, the successor to the hugely popular “Wii Fit” sports more than a dozen new activity types, as well as the ability to queue up several different activities ahead of time to construct a workout regimen. The first “Wii Fit” was dogged for not having this feature, so it’s great to see it included.

“Mario vs. Donkey Kong: Minis March Again” (releases Monday, DSiware): This downloadable title will have full level creation and online sharing tools.

“Warioware: DIY” (release date unknown): This DSi application lets users create their own five-second microgames and share them online. Reminds me a little of Microsoft’s Xbox Live Arcade game “Kodu,” which was conspicuously absent from their E3 presentation.

“Style Savvy” (release date unknown, DS): Called “Girls Mode” in Japan, this is a simulation that lets players (presumably tween girls, but hey, you never know) run a boutique, take part in runway fashion shows and go shopping for clothes. Laugh all you want, but I could see this being a huge hit.

Coming later tonight: A look at the new games Sony announced for its PlayStation platforms, plus other tidbits on the games announced at E3.