Azelf, Mesprit, and Uxie created the red chain, therefore they know how they can destroy it, and listen to this:
In Celestic Town, it was clearly mentioned that Azelf, Uxie, and Mesprit locked Dialga/Palkia's power away, and Celestic Town was visited by Cyrus himself, as proven when you first encounter him in Mt. Coronet.
In short, Team Galactic is one big plothole in the 4th generation. If Game Freak/Nintendo would only have put in a little more effort, they could've created a decent story, with a decent plot, and no evil team that looks like a bunch of 30-year old space-camp geeks who have conventions and secret meetings in a barn on their parents' farm. Heck, i'd favor the Go-Rock Squad over Team Galactic (and that's saying something)
In Celestic Town, it was clearly mentioned that Azelf, Uxie, and Mesprit locked Dialga/Palkia's power away, and Celestic Town was visited by Cyrus himself, as proven when you first encounter him in Mt. Coronet.
In short, Team Galactic is one big plothole in the 4th generation. If Game Freak/Nintendo would only have put in a little more effort, they could've created a decent story, with a decent plot, and no evil team that looks like a bunch of 30-year old space-camp geeks who have conventions and secret meetings in a barn on their parents' farm. Heck, i'd favor the Go-Rock Squad over Team Galactic (and that's saying something)