Hey, Thantatos! Glad to see another member who's interested in making a Pokémon game. Especially the fact that you'd like to use RPG Maker 2003, as I like using outdated game making programs.
Anyway, welcome to the PokéCommunity, and remember to read the rules.
Check out the Game Development forum and its subforums, you'll be bound to run into some expert game makers who are willing to help. You'll also find many inspiring game projects out there, as I have.