I'm thinking that without the addition of any watered down less powerful water type event pokemon to the beginning of the game Goldeen may see a rise in popularity. It's the best thing I can think of that isn't a starter.
Edit: Actually, Panpour. It's got a pretty good movepool and some nice stats if I remember correctly. Not overpowered by any stretch of the imagination though. That and Bibarel, and Lanturn a bit later.