Or is it just me? because that's basically all I've ever gotten from zapper 1 except for one instance of a nightmare jollin which I treasured endlessly until my next zap.

Well, they are one of the most common zaps. It's done on purpose, though.

And, I don't zap anymore. Because, Swampkonites and gender changes

When I used that zapper I got a ton of Swampie/Darkonite changes. I did get a few random species or color/species changes though. It's all very random. But it does seem to love giving out Swampies/Darkonites. :P

Yeah once I got a spectrum paralix and freaked out, then BAM...swampie. wouldn't be so bad if I actually liked swampies and darkonites.

Yea zapper 1 does seem to favor zapping swampies and darkonites but it's also my favourite zapper if you're trying for a certain colour since it seem to favor colour zaps over colour/species combinations :)