I was quite obviously talking about Ash's Pokémon.
It wasn't obvious to me. "Water-type starter" implies the six starter families only; some of Ash's water-types - Kingler, Corphish, Buizel, and Palpitoad - are not starter Pokemon.
If you meant Ash's "water-type starters," you're right on that one.
I don't know why this is just extending to "water type starters" excluding Froakie, he's only ever had 3, and now with Froakie that makes 4.
But he's had a crap ton of water Pokemon who haven't evolved since Krabby. So I don't know why it's just exclusive to water type starters, outside Ash has never had a fully evolved water type starter Pokemon, but plenty of grass and fire.