Seel, Dewgong

People (rightly) condemn The Pokémon Company for the lameness of some recent designs, like the woefully uninspired Flamigo. But it’s fair to point out, it was ever thus. They literally changed a letter and put a small spike on its head.
And admit it—you forgot Dewgong existed. It’s so similar to Seel, which is already so forgettable, that it just sort of blurs out of existence. In fact, click “Next” and you won’t remember you were just looking at it.