Some designs pull it off well imo. Tyrantrum's is incredibly subtle (so much so in fact that it might not even count) and Empoleon's is very well incorporated into the design and doesn't stand out or clash very much. And like
>>43827774 said, Krookodile and Watchog pull it off in so that it's like a pattern on the body, as opposed to Cinderace or Sawk where they look like they're wearing actual clothes.
