grassdragon,
SA2 (Sonic Adventure 2) Is about Sonic, who gets confused as Shadow the Hedgehog for stealing the Chaos Emeralds. Their number one priority is catching Sonic, who is wrongly identified.
Sonic now must find a way to:
a) Clear his name
b) Save the world from Eggman, who is behind the whole plot as usual.
I always pick the Water, with the exceptions I mentioned. Being Cyndaquil, and Torchic in both Johto and Hoenn respectively.
Hmm. Not sure I see it exactly as you do, but I can see why you would think it (via the way it moves). I just love the thought of having a frog and a tree. That way I have a tree frog XD