I've started playing Pokemon Y on my Nintendo 3DS console. I got stuck when I filled all six available Pokemon slots. Now I would like to put some of Pokemons into Pokeballs in order to get more space for new ones. Unfortunately neither me nor my friend was able to figure out how to do it. Could you, please, help?
I don't really understand the question but I think you want to move Pokemon from your party to your PC. In every PokeCenter there is a red PC. Once you boot it up you can access your PC and deposit Pokemon you no longer wish to use.
Also. When your party is full, every Pokemon you'll catch will be deposited into your PC automatically