The genders aren't that big of a deal. As it is, there is plenty of feminine looking men and masculine looking females, which works out fine in the end for most Pokemon. Machop line is the only one that is pretty weird considering they are exposing their chest. But these aren't humans so...
Originally Posted by KarmaCrasher
There is no "unnecessary" evolution. What difference does it make if Rhydon got an evolution, regardless of it's own status, getting an evolution for one reason or another is always possible.
Also, Pokemon isn't done yet, there can always be future evolutions or pre-evolutions for other Pokemon down the line. They aren't going to do it for every single one right off the back, they save some for later.
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