It's because DBZ was less about adventures where unique skills would be useful and more about arena fights where only martial arts and ki blasts were needed...
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...*wanders off and finds a place to watch all of the original Dragonball*
I think the dub reason is BS - there are a lot of picky anime fans who just can't stand English VAs. But I don't think that stops porn. If it's a cute character people will draw it before they even hear it - speaking from experience.
I've seen some, but I'd think it's just not a popular character. I always want to see lots of Oolong porn, I liked his VA, but he's not popular either. It's all about the muscle men so we see lots of Goku and Vegeta. So no cute Puar or Oolong.
...silly translators >>
And yeah, why ISN'T there more Puar porn???!!
Except Puar is way cuter than Yamcha
But yeah, Launch, Puar, and Oolong were basically put on a bus in Z, so no one really got too exposed to them.
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...*wanders off and finds a place to watch all of the original Dragonball*
I've seen some, but I'd think it's just not a popular character. I always want to see lots of Oolong porn, I liked his VA, but he's not popular either. It's all about the muscle men so we see lots of Goku and Vegeta. So no cute Puar or Oolong.
...oh... oh, you weren't talking about that x__X
It has failed us for the first time for the last time!
However, it -does- have a bunch of epic wins, which I think more than makes up for its lack of Puar 34 =D