I just learned yesterday that there was supposed to be an extra city in Pokemon Red/Green. It was probably cut because they couldn't fit it in the Gameboy cartridge, as it was already full. I'm also aware that a lot of locations were cut or changed in Pokemon Gold/Silver.
So my question is, do we know if the same thing is true for Ruby/Sapphire, Diamond/Pearl and Black/White? Do these games also have any cut locations like that, which weren't included in the finished game?