Even without Mudkip, Piplup would NOT be the first non reptile water starter, I'm not kidding. I think it would me more informative that every grass starter before Chespin had a strong reptilian resemblence or some indication of being a reptile. Being the first mammal is not as informative if you don' know what the other starters were and, in my opinion, doesn't feel as notable since Cyndaquil has the same trait, and Cyndaquil is the first mammal starter period. Mudkip is the first water type amphibian starter and Oshawott is the first mammal water starter. Just listing that might as well mean the other starters were anything but mammals instead of a trend.
== "Was" vs. "were" ==