Yeah, but Serebii does (occasionally) post hoaxes. So, we can't always trust them. But another site did say about more information, the ability to play as others, seeing what happened to Grovyle, and why can't you transfer your old team there to make Grovyle have a partner again?
Actually, there is more to the story, by what I understood. Oddly enough, the future will not change, and Grovyle is captured by Dusknoir. But, after a talk with a Sableye, he breaks out with the Sableye's help and goes back to the present. During that time, a new team has arrived and found that Grovyle is stealing Time Gears again and decide to stop him, even though the rest aren't worried. After an epic battle with Grovyle (again), you find out that he is doing this again for the help of time. But, Dusknoir comes back to stop Grovyle and makes your team think that he just lied to you and the rest fell for his lie as well. He says that "he is your partner" just to trick you, and you fall for it. Meanwhile, Grovyle already has 5 Time Gears (again) and Dusknoir captures him and sends you with him to the future, where a Giratina took over and engulfed the world with darkness with Darkrai.
Yeah, I just made it up, but it still makes somewhat sense. Everything in italic may not be true, everything else is.
