So The Atlantic Rim doesn't really exist. The Pacific Rim is a real thing. It's part of geography. But the Atlantic Rim... nope.
When Guillermo del Toro's Pacific Rim came out, the marketing madmen at Asylum decided to release their similar-in-every-way-except-quality mockbuster Atlantic Rim. The movie makes as much sense as its title, which is one way of saying YEEESH. Don't see this movie.
But you can always read my lovely review of it. I try not to hold anything back. Barring vomit. I held back a bit of vomit as I was writing the review. Acid reflux, you understand.