The pokemon didn't have to be found in those regions, I asked to write on my page with a dual-type water pokemon that is obtainable within the first four regions to make it a bit tricky.
-
Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Smogon Forums
SnoopysWorld
Rajikaru
Hmm, it probably would've been better to write "In at least one of the first four regions" to be less vague, but I suppose that's fair enough.