When I first saw Hippo, I thought it was ugly as fucking hell.
But really, they are quite creative. If anyone's noticed, there has been a different primate-inspired Pokemon every generation (Primeape, Aipom, Slaking, Infernape) and every single time they put a nice twist to it. On a side note, iirc, they never put a freaking zebra or tiger-inspired Pokemon. ;_;
(Emphasis on iirc---it's so hard to keep track of nearly 500 goddamn Pokemon...)
But there's a lot of other things I don't like that Gaemfreak has done over the years, so I'll just leave with the fact that I hate D/P in general. Not the metagame, hence why I'm here, but the actual games.
RBYGSC ftw.