The pokemon Trophius and Krobat do not exist. There's a Tropius and Crobat however... (Ah the joy that comes from mocking peoples' typos)
Also, through usage of the Eon Ticket from Nintendo Power, it is possible to get both Latios or Latias in either game without trading. I have Ruby and caught Latias on the Southern Island, and then captured Latios in the wild.
Also, Deoxys is an awesome Pokemon. I hope they make some promotion where you can catch him.
Has anyone heard the Pokemon News? They're releasing remakes of the original Pokemon onto GBA called Pokemon Fire Red/Pokemon Leaf Green (The Blue version of Pokemon was Green in Japan), however with much better graphics, sound, etc... plus you can catch more than the first 150 Pokemon in it. With some islands, you can catch Ho-oh, Mewtwo, Lugia, Deoxys, and other legendaries. They were just released in Japan and are scheduled for release in North America in September.
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If it is black and white and smells awful, I assure you it''s adorable.