From: DeathSnipe777 | Posted: 11/17/2010 11:54:42 AM | #012 It was never a "glitch." Azurill and Marill have different gender ratios, so Azurill will sometimes change gender when it evolves. It isn't a glitch whatsoever.
Hence the quotation marks.
Not removing this until Jigglypuff returns to the anime. [8/25/08] http://i42.tinypic.com/ta0rc4.jpg http://i44.tinypic.com/24pdqgh.jpg
It's a glitch in the same way that Gen III Pokemon can evolve to have different abilities; instead of hardcoding that information into a Pokemon's data structure, it's tied to the PID, so what's the case for one part of the evolutionary line might not be the same for the next.
There's no reason whatsoever for Marill to change genders; this situation is a programmatical oversight. Now, I've heard that various things have been dissociated from the PID, and maybe gender is one of them, but I haven't heard much in the way of a definitive answer with regards to the precise makeup of the datastructure this time around.
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It's just like what the smallmouth and largemouth bass are going through in the Potomac River. Maybe there's too much chicken litter pollutants in the pokeworld's waters, and the azurill must evolve to try and keep their numbers up through a sex-change because their dieing off too fast. It also explains why they look sad all the time (except for some artwork of them).
It is a glitch, there is no precedent and no explanation to show the creator's intent, so we must assume this wasn't intended.
No, it would have been a glitch if Azurill's gender ratio was 50/50 like Marill's and some females still turned into males when they evolved. Since Azurill has a 75/25 female/male ratio and Marill has the 50/50, females turning into males is actually the right thing to happen from a coding point of view.