If you have more than 6 Pokemon, you will have to store some in the computer systems in the Pokemon Centres.
List the items and Pokemon you hold/have bought/have stored in a topic in this forum.
Put a link to your own topic in your signature.
Ensure signatures are enabled in your profile preferences.
YOU MAY START WITH:
2 Sandwiches
2 Sodas
You receive 5 Pokeballs and a Pokedex from the professor who calls you at the start.