wasn't mudkip based on a fish? In my opinion, they already did a reptile for each starter (Chamander, Totadile, and treeko) and it bugs me to make another lizard for the water type, even though crocodiles aren't really lizards. I don't even see why we need to stick with the "water starters have to be based on animals that live on land and water" rule. I think if anything we should do some type of fully-aquatic creature that has characteristics of a land animal. (Gible, for example.) I think that's the way to go. If we just try to keep it as land and water dwellers then we are limited, making us come up with unoriginal ideas. I just think making a lizard would seem uncreative. If you did a snake, a frog, even a dinosaur, it could work better but lizards and crocodiles have to much in common for the average person.Perfectly fine :33
As for creativity, it's hard to be creative when it comes to Water-dwelling creatures that can also travel on land. All of the water starters have followed that pattern, so a dolphin doesn't work unfortunately. I think the lizard could be interesting, it'd be more like Sceptile than Feraligatr.