Here is some more info! I have lists of the pokemon that are exclusive to each game, images of the figures you get for pre-ordering each version, and a cute image from IGN of pokemon following their trainers; a feature that apparently has not been done since Pokemon Yellow. (It also wants to make me choose Chikorita even more. No!) Here we go! :)
Pokemon HeartGold: This information was found on Bulbapedia -- The Online Pokemon Encyclopedia
Mankey - Primeape - Growlithe - Arcanine - Spinarak - Ariados - Gligar - Mantine - Phanpy - Donphan - Sableye - Baltoy - Claydol - Kygore - Mantyke - Gliscor
Pokemon SoulSilver: This information was found on Bulbapedia -- The Online Pokemon Encyclopedia
Vulpix - Ninetails - Meowth - Persian - Ledyba - Ledian - Delibird - Skarmory - Teddiura - Ursaring - Mawile - Gulpin - Swalot - Groudan
Exclusiusive Pre-Order Toys! This information was found on Bulbapedia -- The Online Pokemon Encyclopedia
A Cute Pokemon & Trainers Image: This information was found on www.IGN.com
With less then a week until Pokemon HeartGold and SoulSilver release I am finding it hard to contain my excitement. While it will be a couple weeks until I can use my game on the new DSi XL it will still be fun to get started!! Stay tuned for more info.