I don't know either if this should be in the main announcement topic, but I wanted to bring on a few points.
1) Pokemon Yellow sure did the trailing function more elegantly than Squaresoft in Final Fantasy VIII. While the characters in FFVIII looked stupid running after each other, Pokemon looked nice. So this is a continuation of that.
2) But why does Chikorita follow the trainer? Doesn't it like PokeBalls?