I don't know if [email protected] is Latias or Latios but since @ has a ''a'', I think is Latias..
Some questions, answers, comments and even if you search for ''[email protected]'' at Pokémondb, you will find many question with that..
Is this someone of a banned word or people like that? I don't know xD
[email protected] refer to both Latias and Latios. It is simply a way to refer to both of them for less effort.